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