Perhaps you should try some spelling variations:
"modified multiobjective approximation algorithms" » "modified multiobjective optimization algorithms"
"enabling learning method algorithm" » "mapping learning method algorithm", "enabling learning mom algorithm", "enabling learning methods algorithm", "enabling graining methods algorithm", "enabling learning emotion algorithm"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("enabling learning method algorithm") or ("modified multiobjective approximation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("enabling learning method algorithm") OR ("modified multiobjective approximation algorithms"))*.
• Removing quotes may allow a broader search: (( enabling learning method algorithm ) or ( modified multiobjective approximation algorithms ))*.