You can simply add words and press "search".
Here some operators you can use to specify your search:
- no operator is similar to OR
- + or AND for linking two or more words. Each word must be present in the result
- - or NOT for unlinking two or more words. The prefixed word must not be present in the result
- < or >: decrease or increase the relevance of the prefixed word.
- * (asterisk): use as placeholder (wildcard)
- "" (double quote): A phrase that is enclosed within double quote characters matches only rows that contain the phrase literally, as it was typed.
For professionals: please take a look at the mysql-documentation on http://dev.mysql.com/doc/refman/5.0/en/fulltext-boolean.html.