Depending on your topic, you may find it helpful to use terms such as those listed below in a variety of combinations (e.g. "public administration" and "personnel selection").
The Boolean search strategy allows you to combine - or connect - multiple terms into a single search, thereby allowing for a more focused search. The result of a successful Boolean search is a list of results targeted to your specific topic. Knowing how to do a Boolean search is especially helpful when searching large databases for relevant articles. Here is a quick and understandable tutorial if you need more information: