Evaluate whether the search results are useful, do they fill your information need? Are they relevant to your search topic? Relevance can be evaluated by examining the heading, abstract, year of publication and subject terms. Consider also if the search results are reliable, objective, up-to-date, accurate or scientific.
If you are not satisfied with the search results, broaden or limit your search in different ways. Utilize, for example, the narrowing options in databases. Return also to previous stages of the process of information searching to create a new search statement.
Searching for information can be frustrating, and the process does not always end with finding perfect sources, but with each new search you become a better searcher!