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