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