I'm going to bet that you're testing the NLS feature on a
project that you generated but did not publish to a RoboEngine
server. The NLS feature will
not work on a project generated to your local drive; it must
be published first. So if you generate your project and then view
it, the behavior you describe--questions don't return results, but
terms do--will occur. (Actually, it's not a "question" issue; it's
the result of entering too many terms into the search field.)
On the off chance that you're testing the feature from the
RoboEngine server, check your RoboEngine search settings. It's
possible that they're set too high, which lowers the number of
search results.
To check the engine's search settings:
1. Open the Configuration Manager.
2. Open the engine.
3. Click the
Projects icon.
4. Check the number in the
Relevance Threshold field. The higher the number, the fewer
search results the engine returns.
Good luck!