Perhaps you should try some spelling variations:
"modified objective allocation algorithms" » "modified objective estimation algorithms", "modified objective approximation algorithms"
"mapping learning method algorithm" » "machine learning method algorithm", "enabling learning method algorithm", "mapping learning mom algorithm", "mapping learning methods algorithm", "mapping graining methods algorithm", "mapping learning emotion 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 objective allocation algorithms") OR ("mapping learning method algorithm"))~.
• Removing quotes may allow a broader search: (( modified objective allocation algorithms ) or ( mapping learning method algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified objective allocation algorithms") or ("mapping learning method algorithm"))*.