Perhaps you should try some spelling variations:
approximation algorithm » approximation algorithms
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
orca approximation » one approximation, _ approximation, time approximation
game optimization » stage optimization, qoe optimization, market optimization
modified game » modified male, modified adam

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( modified game optimization algorithms ) OR ( modified orca approximation algorithm ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( modified game optimization algorithms ) OR ( modified orca approximation algorithm ))".
• Adding a wildcard symbol may retrieve word variants: (( modified game optimization algorithms ) OR ( modified orca approximation algorithm ))*.