Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
game optimization » stage optimization, qoe optimization, market optimization
pre algorithm » mppt algorithm, qspr algorithm, _ algorithm
modified game » modified male, modified adam
using pre » nursing pre, using one, using ph

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( (code or core) using pre algorithm ) or ( modified game optimization algorithms ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( (code OR core) using pre algorithm ) OR ( modified game optimization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (( (code or core) using pre algorithm ) or ( modified game optimization algorithms ))*.