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