Perhaps you should try some spelling variations:
"a estimation algorithms" » "a optimization algorithms", "a optimisation algorithm", "a approximation algorithms", "_ estimation algorithms", "a destination algorithms", "_ estimating algorithms"
"_ simulation algorithm" » "_ solution algorithm", "_ optimisation algorithm", "_ evolution algorithm"
"policy estimation algorithm" » "policy optimization algorithm", "pose estimation algorithm", "motion estimation 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 ("_ simulation algorithm"))) OR ("policy estimation algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"a estimation algorithms\") OR (\"_ simulation algorithm\"))) OR (\"policy estimation algorithm\"))".
• Removing quotes may allow a broader search: (((( a estimation algorithms ) OR ( _ simulation algorithm ))) OR ( policy estimation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("a estimation algorithms") OR ("_ simulation algorithm"))) OR ("policy estimation algorithm"))*.