Perhaps you should try some spelling variations:
"modified objective allocation algorithms" » "modified objective estimation algorithms", "modified objective approximation algorithms"
"modified learning evolution algorithm" » "modified learning solution algorithm", "modified learning evolutionary algorithm", "modified learning convolution algorithms", "modified learning convolution algorithm", "modified learning emotion algorithm", "mobile learning evolution algorithm", "modified caging evolution algorithm"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified objective allocation algorithms") or ("modified learning evolution algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified objective allocation algorithms") OR ("modified learning evolution algorithm")).
• Removing quotes may allow a broader search: (( modified objective allocation algorithms ) or ( modified learning evolution algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified objective allocation algorithms") or ("modified learning evolution algorithm"))*.