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