Perhaps you should try some spelling variations:
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
near optimization » network optimization, stage optimization, _ optimization
modified near » modified seird, modified adam
using search » using egarch, nursing research
code » core

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( code ((using search) OR (using servo)) algorithm ) or ( modified near optimization algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( code ((using search) OR (using servo)) algorithm ) OR ( modified near optimization algorithm ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( code ((using search) OR (using servo)) algorithm ) or ( modified near optimization algorithm ))*".