Perhaps you should try some spelling variations:
"modified objective estimation algorithms" » "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective approximation algorithms", "modified objective allocation algorithms"
"modified fire estimation algorithm" » "modified pose estimation algorithm", "modified risk estimation algorithm", "modified sphere estimation algorithm", "modified seird estimation algorithm", "modified bi1 estimation algorithm", "modified male estimation 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 fire estimation algorithm") OR ("modified objective estimation algorithms"))~.
• Removing quotes may allow a broader search: (( modified fire estimation algorithm ) or ( modified objective estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified fire estimation algorithm") or ("modified objective estimation algorithms"))*.