Perhaps you should try some spelling variations:
"modified objective estimation algorithmss" » "modified objective estimation algorithms", "modified objective estimation algorithm", "modified objective optimization algorithms", "modified objective optimization algorithmss", "modified objective allocation algorithmss"
"modified robust optimisation algorithm" » "modified robust optimization algorithms", "modified robust estimation algorithm", "modified robust estimation algorithms", "modified robust optimization algorithm"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified objective estimation algorithmss") or ("modified robust optimisation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified objective estimation algorithmss") OR ("modified robust optimisation algorithm")).
• Removing quotes may allow a broader search: (( modified objective estimation algorithmss ) or ( modified robust optimisation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified objective estimation algorithmss") or ("modified robust optimisation algorithm"))*.