Perhaps you should try some spelling variations:
"motion estimation algorithms" » "motion estimation algorithm", "motion optimization algorithms", "motion optimisation algorithm"
"a simulation algorithm" » "a estimation algorithm", "a solution algorithm", "a optimisation algorithm"
"_ simulation algorithm" » "_ estimation algorithm", "_ solution algorithm", "_ optimisation 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 simulation algorithm") OR ("_ simulation algorithm"))) or ("motion estimation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("a simulation algorithm") OR ("_ simulation algorithm"))) OR ("motion estimation algorithms")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"a simulation algorithm\") OR (\"_ simulation algorithm\"))) or (\"motion estimation algorithms\"))".
• Removing quotes may allow a broader search: (((( a simulation algorithm ) OR ( _ simulation algorithm ))) or ( motion estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (((("a simulation algorithm") OR ("_ simulation algorithm"))) or ("motion estimation algorithms"))*.