You can modify a public-facing search form within a web page or display template so that search results are constrained by additional parameters. You can also hard code a search query or other parameters in the hyperlink URL itself.
For example, you can specify that the search include only certain folders. The required format is:
...search.jsp?<parameter_name>=<value>
where <parameter_name> is the actual parameter, and <value> is the actual value.
Use the parameters in the following table to fine-tune searches. Keep in mind that parameter names are case-sensitive.
Note: Combining multiple parameters may create unexpected search results. For example, when using folderID and hostID parameters, keep in mind that folderIDs are specific to one host.