Perhaps you should try some spelling variations:
"modified game optimisation algorithms" » "modified game optimisation algorithm", "modified game optimization algorithms", "modified game estimation algorithms", "modified stage optimization algorithms", "modified _ optimisation algorithms", "modified male optimisation algorithms", "modified adam optimisation algorithms"
"modified objective allocation algorithm" » "modified objective estimation algorithm", "modified objective evolution algorithm", "modified objective predation 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 allocation algorithm") or ("modified game optimisation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified objective allocation algorithm") OR ("modified game optimisation algorithms")).
• Removing quotes may allow a broader search: (( modified objective allocation algorithm ) or ( modified game optimisation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified objective allocation algorithm") or ("modified game optimisation algorithms"))*.