Perhaps you should try some spelling variations:
"modified notion optimization algorithms" » "modified notion optimisation algorithm", "modified notion estimation algorithm", "modified notion optimized algorithms", "modified network optimization algorithms", "modified policy optimization algorithms", "modified allocation optimization algorithms"
"modified effect estimation algorithms" » "modified effect estimation algorithm", "modified effect optimisation algorithm", "modified effect approximation algorithms", "modified effect investigation 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 notion optimization algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified effect estimation algorithms") OR ("modified notion optimization algorithms")).
• Removing quotes may allow a broader search: (( modified effect estimation algorithms ) or ( modified notion optimization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified effect estimation algorithms") or ("modified notion optimization algorithms"))*.