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