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