Perhaps you should try some spelling variations:
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
mental algorithm » genetic algorithm, control algorithm, mppt algorithm
df optimisation » _ optimisation, _ optimization, qoe optimization
using mental » using metal, nursing mental, using medical
modified df » modified _, modified adam, modified bi1
code » core

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: (( code using mental algorithm ) OR ( modified df optimisation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (( code using mental algorithm ) or ( modified df optimisation algorithm ))*.