Perhaps you should try some spelling variations:
"policy optimisation algorithm" » "policy optimization algorithms", "policy estimation algorithm", "policy optimization algorithm", "topology optimization algorithm"
"a estimation algorithms" » "a estimation algorithm", "a optimization algorithms", "a approximation algorithms", "_ estimation algorithms", "a destination algorithms", "_ estimating algorithms"
"a solution algorithm" » "a evolution algorithm", "a convolution algorithms", "a evolutionary algorithm", "_ solution algorithm", "_ solutions algorithm", "nacl solution algorithm"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("a estimation algorithms") or ("a solution algorithm"))) or ("policy optimisation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("a estimation algorithms") OR ("a solution algorithm"))) OR ("policy optimisation algorithm")).
• Removing quotes may allow a broader search: (((( a estimation algorithms ) or ( a solution algorithm ))) or ( policy optimisation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("a estimation algorithms") or ("a solution algorithm"))) or ("policy optimisation algorithm"))*.