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