Perhaps you should try some spelling variations:
"modified exact optimization algorithms" » "modified exact optimisation algorithm", "modified exact estimation algorithm", "modified exact optimized algorithms", "modified game optimization algorithms", "modified stage optimization algorithms"
"modified objective estimation algorithms" » "modified objective estimation algorithm", "modified objective optimisation algorithm", "modified objective approximation algorithms", "modified objective optimization algorithms", "modified objective allocation 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 exact optimization algorithms") OR ("modified objective estimation algorithms"))~.
• Removing quotes may allow a broader search: (( modified exact optimization algorithms ) or ( modified objective estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified exact optimization algorithms") or ("modified objective estimation algorithms"))*.