Perhaps you should try some spelling variations:
"polynomial-rough approximation algorithmsssss" » "polynomial-rough approximation algorithm", "polynomial-rough approximations algorithmsssss", "polynomial-one approximation algorithmsssss"
"polynomial-time approximation algorithms" » "polynomial-one approximation algorithms", "polynomial-_ approximation 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: (("polynomial-time approximation algorithms") or ("polynomial-rough approximation algorithmsssss"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("polynomial-time approximation algorithms") OR ("polynomial-rough approximation algorithmsssss")).
• Removing quotes may allow a broader search: (( polynomial-time approximation algorithms ) or ( polynomial-rough approximation algorithmsssss )).
• Adding a wildcard symbol may retrieve word variants: (("polynomial-time approximation algorithms") or ("polynomial-rough approximation algorithmsssss"))*.