Perhaps you should try some spelling variations:
2c mechatronics » c mechatronics, etc mechatronics, _ mechatronics
2c robotics » 21 robotics, 29 robotics, c robotics
26 robotics » 26 robotic, 16 robotics, 21 robotics
6 robotics » _ robotics, 6 robotic, a robotics
2 robotics » _ robotics, a robotics, 5 robotics
2 robotic » 12 robotic, _ robotic, 3 robotic

Try widening your search to All Fields.

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) OR (6 robotics))))) OR (((2 robotics) OR (2 robotic))))) OR (26 robotics))%2c mechatronics%22.
• Adding a wildcard symbol may retrieve word variants: %22control%((((((2c robotics) or (((26 robotics) or (6 robotics))))) or (((2 robotics) or (2 robotic))))) or (26 robotics))%2c mechatronics%22*.