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