To begin to search successfully you must use a variety of words that relate to your topic
Think of the different words and phrases that people use when they discuss your topic.
Consider broader and narrower words, and synonyms (words that have the same meaning).
Identify search words through your background research or ask a librarian for help in finding words that are used in your field of research.
The starting research question "How do cigarettes impact children's health?" can be broken down into three key concepts: children AND cigarettes AND health.
I can brainstorm related ideas and synonyms to also search - and I will add to my list as I learn.
Use Subject Terms instead of keywords to find the most relevant articles on a topic.
As shown in the image below, you can click on "Subject" in the top banner in Academic Search Complete. This will allow you to search a word and see a list of related terms, broader terms, or narrower terms. You can then use a specific subject heading to search, or you can try using one of those terms to revise your own search. It is a good way of tapping into the words that the database uses to organize info, and thus, find what you need.
(click on image to enlarge)
When you search in the library catalog, databases, or the internet:
Use AND to narrow and focus your search.
Use OR to search for synonyms or like words.
Ex: "fast food" AND nutrition OR health
Use NOT to omit some results from a search.
Ex: NOT reviews
Use truncation symbols (usually ? or *) in library catalog, databases, and online to capture all forms of words
Keep searches simple using basic search words and phrases rather than natural language and sentences.
Use a variety of search terms and look for the terminology of the field and key concepts as you go. Keep track of the new words you find!
Try google advanced search (you can google for it!) to find search tips and tools.
An overview of how to use keywords that capture your research focus effectively in academic databases