Perhaps you should try some spelling variations:
objective optimization » multiobjective optimization
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
research algorithm » search algorithm
based research » asia research, care research
code based » model based, coal based, income based

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