Perhaps you should try some spelling variations:
"polynomial-rough approximations algorithms" » "polynomial-rough approximation algorithms", "polynomial-rough approximation algorithm", "polynomial-rough approximation algorithmss", "polynomial-one approximation algorithms"
"polynomial-time approximations algorithm" » "polynomial-time approximation algorithm", "polynomial-time approximation algorithms", "polynomial-one approximation algorithm"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"polynomial-time approximations algorithm\") OR (\"polynomial-rough approximations algorithms\"))~".
• Removing quotes may allow a broader search: (( polynomial-time approximations algorithm ) OR ( polynomial-rough approximations algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("polynomial-time approximations algorithm") OR ("polynomial-rough approximations algorithms"))*.