Yes, there is. You can use search using the following:
<keyword> user:me is:a
This will search for answers (is:a = is an answer) by you that contain the word <keyword>. If you want to search for all posts by you (answers and questions), just remove the is:a part.
Here's an example of looking for the word local in posts by me:
You can pretty much use this for everything else in the search. For instance, you can use it to search for questions of a specific tag by you using [tag] user:me. This will display all questions/answers by you on questions that were tagged with tag.