Perhaps you should try some spelling variations:
objective optimization » multiobjective optimization
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
predation algorithm » predators algorithm, estimation algorithm
a predation » _ predation, a prediction, orca predation
modified a » modified _, modified df, 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 objective optimization algorithm ) or ( modified a predation algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified objective optimization algorithm ) OR ( modified a predation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( modified objective optimization algorithm ) or ( modified a predation algorithm ))*.