Perhaps you should try some spelling variations:
penile clamp » penile flap (Expand Search), penile glans (Expand Search), penile gland (Expand Search)
chin chuan » ching chuan (Expand Search), chen chuan (Expand Search), chi chuan (Expand Search)
chuan her » chuan he (Expand Search), chuan chen (Expand Search), chuan heng (Expand Search)
chen nong » chen ning (Expand Search), chen neng (Expand Search), chen nan (Expand Search)
j penile » _ penile (Expand Search), a penile (Expand Search), al penile (Expand Search)
can chen » han chen (Expand Search), chuan chen (Expand Search)
clamp a » clamp _ (Expand Search), clamp j (Expand Search)
l chin » l chain (Expand Search), l chan (Expand Search), l chains (Expand Search)
a now » a new (Expand Search), a non (Expand Search), _ now (Expand Search)
3 nac » 3 nacl (Expand Search), a nac (Expand Search), α nac (Expand Search)
_ nac » _ nad (Expand Search), _ nab (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (( j l chin chuan her ) or ((( j penile clamp a now ) or ( ((3 nac) OR (_ nac)) can chen nong ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( j l chin chuan her ) OR ((( j penile clamp a now ) OR ( ((3 nac) OR (_ nac)) can chen nong ))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( j l chin chuan her ) or ((( j penile clamp a now ) or ( ((3 nac) OR (_ nac)) can chen nong ))))*".