Perhaps you should try some spelling variations:
"_ estimating algorithm" » "_ estimation algorithm", "_ estimation algorithms", "_ splitting algorithm"
"_ solution algorithm" » "_ evolution algorithm", "_ convolution algorithms", "_ evolutionary algorithm", "_ solutions algorithm"
"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: (((("_ estimating algorithm") or ("_ solution algorithm"))) or ("one approximation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("_ estimating algorithm") OR ("_ solution algorithm"))) OR ("one approximation algorithms")).
• Removing quotes may allow a broader search: (((( _ estimating algorithm ) or ( _ solution algorithm ))) or ( one approximation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (((("_ estimating algorithm") or ("_ solution algorithm"))) or ("one approximation algorithms"))*.