Perhaps you should try some spelling variations:
"modified allocation optimization algorithms" » "modified allocation optimisation algorithm", "modified allocation estimation algorithms", "modified allocation estimation algorithm", "modified location optimization algorithms"
"modified static estimation algorithmss" » "modified static estimation algorithms", "modified static estimation algorithm", "modified static optimization algorithmss"

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