Perhaps you should try some spelling variations:
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
modified learning » mobile learning, modified caging
game optimization » stage optimization, qoe optimization, market optimization
learning methods » nursing methods
modified game » modified male, modified adam

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

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