Perhaps you should try some spelling variations:
2c mechatronics » etc mechatronics, _ mechatronics, 1 mechatronics
c mechatronics » _ mechatronics, 1 mechatronics, a mechatronics
26 robotics » 26 robotic, 16 robotics, 21 robotics
c robotics » co robotics, _ robotics, a robotics
6 robotics » _ robotics, 6 robotic, a robotics
2 robotics » _ robotics, a robotics, 2 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%((((((2((c robotics) OR (6 robotics))) OR (((c robotics) OR (6 robotics))))) OR (2 robotics))) OR (26 robotics))%((2c mechatronics) OR (c mechatronics))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22control%((((((2((c robotics) OR (6 robotics))) or (((c robotics) OR (6 robotics))))) or (2 robotics))) or (26 robotics))%((2c mechatronics) or (c mechatronics))%22".
• Adding a wildcard symbol may retrieve word variants: %22control%((((((2((c robotics) OR (6 robotics))) or (((c robotics) OR (6 robotics))))) or (2 robotics))) or (26 robotics))%((2c mechatronics) or (c mechatronics))%22*.