Perhaps you should try some spelling variations:
complex trial » complex atrial (Expand Search), complex tibial (Expand Search), complex tropical (Expand Search)
comunes con » comunes son (Expand Search), comunales con (Expand Search), comunes como (Expand Search)
carlos yoel » carlos joel (Expand Search), carlos noel (Expand Search), carlos hoelz (Expand Search)
yl complex » gl complex (Expand Search), cl complex (Expand Search), fl complex (Expand Search)
trial ngoc » trinh ngoc (Expand Search), trial noa (Expand Search), trial neo (Expand Search)
l comunes » y comunes (Expand Search), los comunes (Expand Search), de comunes (Expand Search)
con net » con nee (Expand Search), non net (Expand Search), upon net (Expand Search)
3 nucl » 3 null (Expand Search)
cardo » carlo (Expand Search), cargo (Expand Search), carmo (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 comunes con net ) or ((( 2 yl complex trial ngoc ) or ( 3 nucl cardo carlos yoel ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( j l comunes con net ) OR ((( 2 yl complex trial ngoc ) OR ( 3 nucl cardo carlos yoel )))).
• Adding a wildcard symbol may retrieve word variants: (( j l comunes con net ) or ((( 2 yl complex trial ngoc ) or ( 3 nucl cardo carlos yoel ))))*.