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