The only way to search for terms in TM-Town is to click on Search term in the TM-Town tab, right? With the next segment, TM-Town defaults back to searching for segments (which is what its name suggests, but nevertheless isn't always handy).
I'm not sure how alive TM-Town still is, but perhaps it would be a good idea to make searching for terms instead of segments be a good option?
Right-click at the TM-Town pane and check the available Search options. You can also search for the selected terms clicking the Resource button in the top Search bar.
Wow, I'm impressed.
Just out of curiosity: What was your design decision to leave the TT town terms out of auto-assembling?
The term search function depends on TM-Town API (not on CafeTran's own search algorithms).