One tool that may be of help is the Thesaurus. This database feature can be accessed from the upper-right blue navigation menu at the top of the database. The thesaurus is communication-based, so you will only find terms in it that relate to the communication discipline. It's great if the topic you are searching for has a lot of different names (e.g. new media) and you don't want to waste time typing them all into a search box with OR's in between.
So next time you are searching, check out the Thesaurus and don't hesitate to contact me if you have any questions.