Google search skills - programmer is recommended

Foreword

When I used Google to search for an abnormal problem yesterday, I inadvertently found the following prompt

For reference as above, I listed some keywords at random. Obviously, I couldn’t find the exact matching result. I noticed the prompt in the red box, which reminded me that the current result does not match SpringBoot, whether it must contain, when I clicked must include:

when IAfter clicking, the search bar adds double quotes to the SpringBoot keyword, which seems to indicate that the search results must contain the springboot keyword.
This piqued my curiosity. Although I often use Google to search, the biggest feature of using it is through keyword matching instead of using a long sentence.For better query questions and learning in the future, I need to learn more about Google search skills.

Google search syntax instructions

Use quotation marks to look up an exact word or phrase

You can use "" to specify that search results contain specific words or phrases

In the above query, I marked "java" as a must, and you can see that the results all contain the content about java.

OR query

Separate search terms with OR and execute two search queries simultaneously, which will find pages that contain one of multiple words.
Normally, Google will search all the words you type.By using the OR instruction, Google will know that it needs to look up one set of words or another.OR must be all caps or Google will think it's just part of the keyword and won't execute that search syntax.

Exclude specific sites

Use a hyphen before a word or website to exclude it from search results.
Example:
Exclude Wikipedia pages from search results, syntax: - site:wikipedia.org

Example:
The top search for SpringBoot below is the official website of spring.io

The above syntax is used to exclude the search results of this website
springboot-site::spring.io
You can see that a specific website has been excluded

Title Search

Command: allintitle
Use allintitle:[search phrase] to find pages with these words in the title
Example: Find pages with both "Apple" and "notebook" in the title, syntax: allintitle:Apple notebook
Example:

Note: this is not the contentThe keyword matches, but the keyword matching based on the title, which tends to query more precise content.

Restrict search results to specific sites

Directive: site
Function: Use site:[URL] to limit search results to specific sites

Example: Search only stackoverflow.com finds
site:stackoverflow.com springboot springcloud

View information about a region

Command: location:
Function: Use location:[location] to view relevant information in a certain area
Example: hotel location:anhui to query hotels in Anhui

Limit results to specific file formats

Directive: filetype:
Function: Use filetype:[suffix] to limit the result to a specific file format, such as PDF or DOC.
Example: springboot filetype:pdf Query about Springboot pdf file

Summary

[1] Reasonable use of some search commands can help better obtain the desired results, such as precise search, excluding specific websites, searching only on certain websites, querying data in a specific format, restricting regions, etc.
[2] There are still many related search commands. The above are just some of the search commands that I think are more suitable for developers. They are also good for allintext and intext, but they are not as simple as direct search, and the search results are different.Not too many, and the fewer commands you use, the more portable you will be.