Most article databases prior to 2006 primarily used the subject term "homosexual" or "homosexuality" to refer to LGBTQ populations. EBSCO databases tend to have the most extensive subject thesaurus, but may not have updated the subject terms in older articles. If the material you are searching is historical, you will likely need to use the term "homosexual" in addition to your other keywords.
When searching for material on trans populations, it is sometimes helpful to search "transgender" or "transsexual" in the subject terms--not as keywords. Transgender often comes up as part of the "lesbian, gay, bisexual, transgender, queer" phrase when you use it as a keyword, and can lead to a lot of unrelated articles in your results.
For more subject terms, please see the Books/Search Terms section.
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