Once you have identified your Research Question generate a list of words, or Keywords that are related to your topic. For example, your question, loneliness and college students The keywords related to your topic:
loneliness and "young adults" and "social media" and "colleges or universities" and "united states"...
search keywords:
loneliness and "college students"
Advance Keywords search:
"mobile devices", isolation, United States, studies, "focus groups"
Use AND, OR, NOT to connect your phrases/keywords
to locate both "college students" AND isolation
to locate either word college OR universities
to locate (the first word) depression NOT isolation
* truncation symbol
depress* depressed, depression, depressing