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

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("one approximation algorithms") or ((("_ optimise algorithm") or ("_ estimation algorithms"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("one approximation algorithms") OR ((("_ optimise algorithm") OR ("_ estimation algorithms"))))*.
• Removing quotes may allow a broader search: (( one approximation algorithms ) or ((( _ optimise algorithm ) or ( _ estimation algorithms ))))*.