► Use relevant keywords. You might start with the topic you've chosen -- e.g., rising sea levels in the Marshall Islands. If that doesn't bring up enough material, try using a more general word or phrase: e.g., sea level rise.
► Add more keywords that express your idea or claim: e.g., cost.
► Truncate, or shorten, your keywords with an asterisk to bring in variations. For example, warm* will give you search results containing warming and warmer.
► Use the Advanced Search options to find your keywords in prominent places, such as the title of an article or the subject.
► Think of synonyms or other alternative words or phrases: e.g., global warming, climate change, climate crisis, global heating.
► Every database provides ways to narrow your search results. See the examples from HOLLIS in the sidebar on the next tab. You can always turn off a search limit if it proves too restrictive.
► When you find a really good result, see if the description provides other keywords, headings, or tags that will link to similar material.
► Search news databases for facts about the topic.
► Scan the bibliography or footnotes of an article or a book for other good sources.
► In HOLLIS records, click on the Subject links to bring up other books or articles on the same subject.