Confession: I often start a research quest with a simple Google search. Keeping in mind that not all the information I find on the web is going to be reliable, Google is still a good way to get my feet wet with a topic and gather the relevant vocabulary I need. Then I can move on to a more targeted database search.
Example
During "swarming", scout bees--a subset of a honey bee colony--look for a new home for the queen and about half the worker bees.
You're monitoring the behavior of scout bees establishing a new colony, and you want to learn more.
Step 1: Break up this research question into two or three main concepts.
Step 2: Brainstorm synonyms, acronyms, and variant spellings.
(scout bee* OR honey bee*) AND (colony OR home OR site)