Go to the SEARCH PAGE or simply click on the "Search" tab on any comp10 page.
For the search inside questions, answers, and their titles you can use a more involved logic using the following characters with special meanings:
+ The following word must be contained in the result. - The following word must not be contained in the result. * wild-card character matching any word part
+comp10 good -un*looks for all elements which must contain the word "comp10", which could contain "good" (those are rated better matches), and which do not contain any word with the prefix "un".
For more details on the involved search logic, see the following HELP PAGE OF MySQL.