Perhaps you should try some spelling variations:
"modified policy optimization algorithm" » "modified policy optimization algorithms", "modified policy optimisation algorithm", "modified policy estimation algorithm", "modified topology optimization algorithm"
"modified objective allocation algorithmss" » "modified objective location algorithmss", "modified objective allocation algorithms", "modified objective allocation algorithmic"

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 policy optimization algorithm") or ("modified objective allocation algorithmss"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified policy optimization algorithm") OR ("modified objective allocation algorithmss")).
• Removing quotes may allow a broader search: (( modified policy optimization algorithm ) or ( modified objective allocation algorithmss )).
• Adding a wildcard symbol may retrieve word variants: (("modified policy optimization algorithm") or ("modified objective allocation algorithmss"))*.