Perhaps you should try some spelling variations:
2c mechatronics » c mechatronics, etc mechatronics, _ mechatronics
2c robotics » 2 robotics, 21 robotics, 29 robotics
26 robotics » 6 robotics, 2 robotics, 26 robotic
212 robotic » 2012 robotic, 22 robotic, 21 robotic
1 robotics » _ robotics, a robotics, 6 robotics
12 robotic » 11 robotic, _ robotic, a 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))) OR (1 robotics))) OR (((12 robotic) OR (212 robotic))))%2c mechatronics%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22control%((((((2c robotics) OR (26 robotics))) or (1 robotics))) or (((12 robotic) or (212 robotic))))%2c mechatronics%22".
• Adding a wildcard symbol may retrieve word variants: %22control%((((((2c robotics) OR (26 robotics))) or (1 robotics))) or (((12 robotic) or (212 robotic))))%2c mechatronics%22*.