Perhaps you should try some spelling variations:
"policy optimization algorithms" » "policy optimisation algorithm", "policy estimation algorithms", "policy estimation algorithm", "topology optimization algorithms"
"a solution algorithm" » "a evolution algorithm", "a convolution algorithms", "a evolutionary algorithm", "_ solution algorithm", "_ solutions algorithm", "up solutions algorithm"
"nacl solution algorithm" » "nacl evolution algorithm", "nacl convolution algorithms", "nacl evolutionary algorithm", "exact solution algorithm", "nodal solution 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 optimization algorithms") or ((("a solution algorithm") OR ("nacl solution algorithm"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("policy optimization algorithms") OR ((("a solution algorithm") OR ("nacl solution algorithm")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"policy optimization algorithms\") or (((\"a solution algorithm\") OR (\"nacl solution algorithm\"))))".
• Removing quotes may allow a broader search: (( policy optimization algorithms ) or ((( a solution algorithm ) OR ( nacl solution algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("policy optimization algorithms") or ((("a solution algorithm") OR ("nacl solution algorithm"))))*.