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