Wildcards in Queries
Use Wildcard matching sparingly, because it slows the Content component performance.
You can use the following Wildcard characters in query Text and FieldText queries:
| ? | to match one character. |
| * | to match zero, one, or more characters. |
You can use the UnstemmedMinDocOccs parameter in the [Server] section of the configuration file to specify the number of documents in which a term must occur to consider it in a Wildcard search.
NOTE: To use Wildcards to search for numbers, set SplitNumbers in the [Server] section to False.