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