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

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 optimizer algorithms") OR ("modified objective allocation algorithm"))~.
• Removing quotes may allow a broader search: (( modified choosing optimizer algorithms ) or ( modified objective allocation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified choosing optimizer algorithms") or ("modified objective allocation algorithm"))*.