There are two main ways to narrow your search. One way is to use the limiters within the database. The other is to narrow using your keywords.
Limiters can be found on the left side of the screen after completing a search. To narrow your results, you can:
As you begin your search, it is best to start broad. You can focus your search by adding in keywords and using Boolean operators.
Use AND when you want to find both terms in a resource. ex. "global warming" AND "sea levels"
Use OR when you want to find either term. ex. "sea levels" OR "ocean levels"
Use NOT when you want to find one term without the mention of another term. ex. "climate change" NOT "fossil fuels"
Conducting a Boolean Search
Notice how an initial search for the term "climate change" retrieves 440,424 results. This is an overwhelming number to look at!
Narrow the search by adding an additional keyword.
Adding the additional keyword of "sea levels" brought our result list down to 4,991. These results have both "climate change" AND "sea levels" somewhere within the record because of the AND operator.
Conducting a search with the OR operator will increase the number of results.
Searching for "climate change" and "sea levels" or "oceans" raised the number of results up to 24, 241. While this is not as many as in the original search, it is still an overwhelming number to look through. However, it is helpful to note that if you are not finding enough results, using the OR operator can broaden your search.
To narrow the results even further, add an additional keyword.
The search above will retrieve results that have all three terms somewhere in the record (climate change, sea levels, and Australia). Adding keywords makes the search more specific. If the search is not retrieving enough results, take away one of the keywords.