Perhaps you should try some spelling variations:
"modified near approximation algorithm" » "modified near approximation algorithms", "modified one approximation algorithm", "modified network approximation algorithm", "modified _ approximation algorithm", "modified seird approximation algorithm", "modified adam approximation algorithm"
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified near approximation algorithm") OR ("modified multiobjective optimization algorithm"))~.
• Removing quotes may allow a broader search: (( modified near approximation algorithm ) or ( modified multiobjective optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified near approximation algorithm") or ("modified multiobjective optimization algorithm"))*.