Perhaps you should try some spelling variations:
"modified changing optimization algorithmss" » "modified changing optimization algorithms", "modified changing optimisation algorithm", "modified changing estimation algorithms", "modified staffing optimization algorithmss", "modified caging optimization algorithmss"
"modified objective estimation algorithm" » "modified objective optimization algorithm", "modified objective allocation algorithm"

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

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