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

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 optimisation algorithms") or ("modified quadratic optimisation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified objective optimisation algorithms") OR ("modified quadratic optimisation algorithm")).
• Removing quotes may allow a broader search: (( modified objective optimisation algorithms ) or ( modified quadratic optimisation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified objective optimisation algorithms") or ("modified quadratic optimisation algorithm"))*.