Perhaps you should try some spelling variations:
"policy optimization algorithm" » "policy optimization algorithms", "policy optimisation algorithm", "policy estimation algorithms", "topology optimization algorithm"
"a simulation algorithm" » "a solution algorithm", "a optimisation algorithm", "a estimation algorithms", "_ simulation algorithm"
"a estimation algorithm" » "_ estimation algorithm", "a destination algorithm", "_ estimating algorithm"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("policy optimization algorithm") or ((("a simulation algorithm") OR ("a estimation algorithm"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("policy optimization algorithm") OR ((("a simulation algorithm") OR ("a estimation algorithm")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"policy optimization algorithm\") or (((\"a simulation algorithm\") OR (\"a estimation algorithm\"))))".
• Removing quotes may allow a broader search: (( policy optimization algorithm ) or ((( a simulation algorithm ) OR ( a estimation algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("policy optimization algorithm") or ((("a simulation algorithm") OR ("a estimation algorithm"))))*.