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