To search for an applicant you must first go to the Talent page.
Once there you will need to then click on the blue button in the upper right hand corner labeled SEARCH TALENT.
Once you have done this, there will be a Search Talent section on the page. You may then search applicants by name, by tags, or by ratings.
Click on the blue Search Applicants button when you have entered in the information and candidates that match your search will appear in the talent pool below.