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