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