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