As searches are performed and familiarity with the topic and databases increase, new keywords will become available. These words will be in titles, subject terms, abstracts, and within relevant articles. It is important to capture and use these words. The search process is not linear, so as these words appear, the research process needs to be revised taking these new words into account. This may also affect the original reseach topic/statement. Depending on results (too many or not enough), the search strategy may change.
Remember, the library staff are available to help you through the search process!