Perhaps you should try some spelling variations:
_ mechatronics » _ mechanics
1 mechatronics » 1 mechanics, _ biomechatronics
2c robotics » 2 robotics, 21 robotics, 29 robotics
26 robotics » 6 robotics, 2 robotics, 26 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%((2c robotics) OR (26 robotics))%((((1 mechatronics) OR (_ mechatronics))) OR (_ bioelectronics))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22control%((2c robotics) or (26 robotics))%((((1 mechatronics) OR (_ mechatronics))) or (_ bioelectronics))%22".
• Adding a wildcard symbol may retrieve word variants: %22control%((2c robotics) or (26 robotics))%((((1 mechatronics) OR (_ mechatronics))) or (_ bioelectronics))%22*.