Perhaps you should try some spelling variations:
"modified objective estimation algorithms" » "modified objective estimation algorithm", "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective allocation algorithms"
"modified choosing optimized algorithms" » "modified choosing optimized algorithm", "modified choosing optimizer algorithms", "modified choosing optimization algorithms", "modified caging optimized algorithms"

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

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