Perhaps you should try some spelling variations:
"modified geometric estimation algorithms" » "modified geometric estimation algorithm", "modified geometric optimization algorithms", "modified geometric optimisation algorithm", "modified geometrical optimization algorithms"
"modified objective solution algorithm" » "modified objective evolutionary algorithm", "modified objective allocation algorithm", "modified objective evolution algorithm", "modified objective convolution 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 geometric estimation algorithms") OR ("modified objective solution algorithm"))~.
• Removing quotes may allow a broader search: (( modified geometric estimation algorithms ) or ( modified objective solution algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified geometric estimation algorithms") or ("modified objective solution algorithm"))*.