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