Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
game optimization » stage optimization, qoe optimization, market optimization
making methods » learning methods, graining methods
modified game » modified male, modified adam
core » more, care

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 OR core) making methods algorithm ) OR ( modified game optimization algorithms ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( (code OR core) making methods algorithm ) or ( modified game optimization algorithms ))~".
• Adding a wildcard symbol may retrieve word variants: (( (code OR core) making methods algorithm ) or ( modified game optimization algorithms ))*.