Perhaps you should try some spelling variations:
c mechatronics » _ mechatronics, 1 mechatronics, a mechatronics
29 robotics » 2 robotics, 9 robotics, 19 robotics
26 robotics » 2 robotics, 26 robotic, 16 robotics
6 robotics » _ robotics, 6 robotic, a robotics

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%((29 robotics) OR (((26 robotics) OR (6 robotics))))%c mechatronics%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%22control%((29 robotics) or (((26 robotics) OR (6 robotics))))%c mechatronics%22".
• Adding a wildcard symbol may retrieve word variants: %22control%((29 robotics) or (((26 robotics) OR (6 robotics))))%c mechatronics%22*.