Perhaps you should try some spelling variations:
"modified effect estimation algorithms" » "modified effect estimation algorithm", "modified effect optimization algorithms", "modified effect optimisation algorithm", "modified effect investigation algorithms"
"modified objective optimized algorithms" » "modified objective optimized algorithm", "modified objective optimizer algorithms", "modified objective optimization algorithms", "modified objective optimal algorithms"

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 effect estimation algorithms") or ("modified objective optimized algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified effect estimation algorithms") OR ("modified objective optimized algorithms")).
• Removing quotes may allow a broader search: (( modified effect estimation algorithms ) or ( modified objective optimized algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified effect estimation algorithms") or ("modified objective optimized algorithms"))*.