Perhaps you should try some spelling variations:
objective optimization » multiobjective optimization
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
emotion algorithm » evolution algorithm, estimation algorithm, predation algorithm
learning emotion » learning method

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