Perhaps you should try some spelling variations:
nab clamp » rnap clamp (Expand Search), a clamp (Expand Search), pna clamp (Expand Search)
las noss » las notas (Expand Search), elas nos (Expand Search), las nsr (Expand Search)
clamp ar » clamp a (Expand Search), clamp _ (Expand Search), clamp j (Expand Search)
nat cov » bat cov (Expand Search), bat covs (Expand Search), nat comm (Expand Search)
cov las » cov la (Expand Search), cov case (Expand Search), cov mabs (Expand Search)
com can » com cana (Expand Search), com cant (Expand Search), com cal (Expand Search)
can now » can non (Expand Search), can new (Expand Search), can ngoc (Expand Search)
ar nos » mar nos (Expand Search), par nos (Expand Search), amor nos (Expand Search)
e nat » e nata (Expand Search), e nao (Expand Search), e nas (Expand Search)
_ nab » _ nad (Expand Search)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

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

• Removing quotes may allow a broader search: (( e nat cov las noss ) or ((( _ nab clamp ar nos ) or ( j e com can now ))))*.