PubMed has over 37 million citations and the content grows daily. Using advanced search techniques helps refine a search. You'll be able to control the results more and get more relevant results.
Note that not all databases use the same symbols and that PubMed does not use wildcards or proximity operators.
Truncation Symbol (an asterisk in most databases): Using a truncation symbol lets you search for various spellings of a word. Use the root of the word with the truncation symbol at the end.
Finds pharmacology, pharmacy, pharmaceutical, etc.
Phrase searching (quotation marks): Searching for terms as a phrase is helpful if words are common used.
“health care reform”
health AND care AND reform
Wildcard character: A wildcard character can be used to substitute a character or characters, such as American/British spelling variations. Wildcard symbols are often # or ?.
Finds woman or women
Finds hemodialysis or haemodialysis
Proximity Operators: Also called adjacency operators, allow you to define how closely you want your search terms to be found in relation to another. Not all databases have this capability and not all of them use the same operators. Check each databases About info for details.
Each database has different search operators. In PubMed, you can use these:
[ti] to find the word in a title [ti] / or title and abstract [tiab]
[au] finds author [au]
Searching for “holy water”[ti] AND Kirschner[au] =
Holy springs and holy water: Underestimated sources of illness? Kirschner AK. J Water Health. 2012 Sep; 10(3): 349-57.
Use [tw] for Text Word to ask PubMed to turn off automatic term mapping and find what you want it to find.
Next, we'll build a final search strategy using all the techniques from the previous pages.