Perhaps you should try some spelling variations:
c mechatronics » _ mechatronics, a mechatronics, 3 mechatronics
1 mechatronics » _ mechatronics, 1 mechanics, _ biomechatronics
29 robotics » 9 robotics, 19 robotics, 21 robotics
2 robotics » _ robotics, a robotics, 2 robotic

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: %22control%((29 robotics) OR (2 robotics))%((c mechatronics) OR (1 mechatronics))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22control%((29 robotics) or (2 robotics))%((c mechatronics) OR (1 mechatronics))%22".
• Adding a wildcard symbol may retrieve word variants: %22control%((29 robotics) or (2 robotics))%((c mechatronics) OR (1 mechatronics))%22*.