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