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