You can be as general or as specific as you want, when you search. The only requirement is that you choose at least one of the search criteria to search on.
You can enter a keyword for the job title you are looking for (e.g., Account Executive or Administrative Assistant, to find candidates who have served in this role before) or enter Java, C++ (for example) if you are looking for a candidate with specific technical skills. Use Advanced Options to create a guided Boolean search or to search on more specific criteria like candidate's name, previous employer or email address. You can also specify many other search criteria, as shown on the Search tab.