Lemonade, thank you for your comment. Right now we are working hard on improving our search and feedback like yours is really helpful. Problem with "jumping" in search entry field will be fixed ASAP.
Regarding result quality, we're experimenting with different search engines and that may cause some inaccurate results you experienced. To help us a bit more, could you share the keywords you were trying to enter and what was your expectations? That would help us a lot to find wrong patterns and make the improvements.
Feedback (with keyword examples) from other visitors would also be very appreciated.