When you put a word or phrase in quotes, the results will only include sites with the same words in the same order as the ones inside the quotes.
Combine searches for multiple phrases or keywords.
Example: "<html lang=\"fr\">" bootstrap
When you use a dash before a word or keyphrase, it excludes sites with that info from your results.
Example: "amcharts.js" -bootstrap
To use a double quote which is used to enclose strings, you need to escape it using the backslash character.
Example: "<html lang=\"fr\">"
Escaping a backslash with another backslash is required. Two consecutive backslashes will be interpreted as a single backslash.