Perhaps you should try some spelling variations:
"_ optimization algorithm" » "_ optimization algorithms", "_ optimisation algorithm", "_ estimation algorithm"
"_ optimized algorithm" » "_ optimized algorithms", "_ optimizer algorithms"
"one approximation algorithms" » "time approximation algorithms", "_ approximation algorithms", "rough approximations algorithms"

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: (("_ optimized algorithm") or ((("_ optimization algorithm") or ("one approximation algorithms"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("_ optimized algorithm") OR ((("_ optimization algorithm") OR ("one approximation algorithms")))).
• Removing quotes may allow a broader search: (( _ optimized algorithm ) or ((( _ optimization algorithm ) or ( one approximation algorithms )))).
• Adding a wildcard symbol may retrieve word variants: (("_ optimized algorithm") or ((("_ optimization algorithm") or ("one approximation algorithms"))))*.