Perhaps you should try some spelling variations:
"policy optimization algorithm" » "policy optimization algorithms", "policy optimisation algorithm", "policy estimation algorithm", "topology optimization algorithm"
"_ optimizer algorithms" » "_ optimized algorithm", "_ optimization algorithms", "_ optimize algorithms", "_ optimise algorithms"
"_ optimized algorithms" » "_ optimized algorithm", "_ optimization algorithms"

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 ((("_ optimizer algorithms") or ("_ optimized algorithms"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("policy optimization algorithm") OR ((("_ optimizer algorithms") OR ("_ optimized algorithms")))).
• Removing quotes may allow a broader search: (( policy optimization algorithm ) or ((( _ optimizer algorithms ) or ( _ optimized algorithms )))).
• Adding a wildcard symbol may retrieve word variants: (("policy optimization algorithm") or ((("_ optimizer algorithms") or ("_ optimized algorithms"))))*.