Perhaps you should try some spelling variations:
approximation algorithm » approximation algorithms
objective optimisation » objective optimization, multiobjective optimization
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
near approximation » one approximation, network approximation, _ approximation
modified near » modified seird, 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 near approximation algorithm ) OR ( modified objective optimisation algorithm ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( modified near approximation algorithm ) OR ( modified objective optimisation algorithm ))".
• Adding a wildcard symbol may retrieve word variants: (( modified near approximation algorithm ) OR ( modified objective optimisation algorithm ))*.