However obvious this may sound, questions that remain unclear in one's mind don't improve with retelling. One simply can't determine when an answer is sufficient or good unless the question is clear. Ideally, this follows easily from self-definition, but not necessarily. The question has to be translated or presented in terms the respondent understands. Knowing jargon, geographical terms, job titles and regulatory agency names gives a start on where answers may be found and how to frame questions - for humans or machines.
Disciplinary boundaries are also key.
Ward and Hanson review how disciplines or professions are established. Sources and search terms often are keyed to these divisions. Without current appreciation of these shifts, one would be hard put to do a complete search for current or historic information. As you know by now, a search that is too narrowly specified misses much if not all important information. One that is too loosely or broadly specified includes too much irrelevant information.