Perhaps you should try some spelling variations:
etc mechatronics » c mechatronics, data mechatronics, opto mechatronics
11 mechatronics » 1 mechatronics, a mechatronics, 11 mechanics
_ mechatronics » _ mechanics
26 robotics » 6 robotics, 2 robotics, 26 robotic
16 robotics » 6 robotics, 1 robotics, 11 robotics
a robotic » _ robotic, a robot

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%((a robotic) OR (((26 robotics) OR (16 robotics))))%((((11 mechatronics) OR (etc mechatronics))) OR (_ mechatronics))%22.
• Adding a wildcard symbol may retrieve word variants: %22control%((a robotic) or (((26 robotics) or (16 robotics))))%((((11 mechatronics) or (etc mechatronics))) or (_ mechatronics))%22*.