Perhaps you should try some spelling variations:
"modified _ optimisation algorithmssss" » "modified _ optimization algorithms", "modified _ optimization algorithmsssss", "modified _ estimation algorithmssss", "modified _ estimation algorithmsssss"
"modified objective optimisation algorithm" » "modified objective optimization algorithm", "modified multiobjective optimization algorithm", "modified objective optimization algorithms", "modified objective estimation algorithm", "modified objective estimation algorithms"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified _ optimisation algorithmssss") OR ("modified objective optimisation algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified _ optimisation algorithmssss\") OR (\"modified objective optimisation algorithm\"))".
• Removing quotes may allow a broader search: (( modified _ optimisation algorithmssss ) OR ( modified objective optimisation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified _ optimisation algorithmssss") OR ("modified objective optimisation algorithm"))*.