Perhaps you should try some spelling variations:
"modified objective allocation algorithms" » "modified objective estimation algorithms", "modified objective approximation algorithms"
"modified parameters optimizer algorithms" » "modified parameters optimized algorithms", "modified parameters optimized algorithm", "modified parameters optimization algorithms"

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

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