7 useful google search syntax

We use google search all the time, mostly by typing a keyword into the search bar and press enter. This gives us lots of content, sometimes more than needed. With some constrain, we can narrow down the search.

1. "java +xyzcode" this will search java, but the page must contains xyzcode, you can change + to - to indicate that the page must not contain xyzcode.
2. "cache:xyzcode.blogspot.com" this will search google cached page history. As a blogger, if you saved something by mistake, don't panic, google has the backup. 
3. "site:xyzcode.blogspot.com java" this will search java only on website xyzcode.blogspot.com
4. "filetype:pom JGraphT" this will search JGraphT only in file type pom.
5. "inurl:xyzcode" this will search xyzcode in the url itself.
6. "xyzcode@facebook" this will search xyzcode in facebook.
7. "#xyzcode" this will search hashtag xyzcode.