Perhaps you should try some spelling variations:
complejo tran » complejo tres (Expand Search), complejo craneo (Expand Search), complejo termal (Expand Search)
complicada en » aplicada en (Expand Search), comparada en (Expand Search)
l complicada » la complicada (Expand Search), _ complicada (Expand Search), e complicada (Expand Search)
carlos neto » carlos nieto (Expand Search), carlos newton (Expand Search), carlos nino (Expand Search)
y complejo » y compleja (Expand Search), el complejo (Expand Search), un complejo (Expand Search)
tran ngo » tran ngoc (Expand Search), tran nho (Expand Search), tran nga (Expand Search)
nac cony » a cony (Expand Search), nac core (Expand Search)
en net » en new (Expand Search), en nee (Expand Search), en nel (Expand Search)
3 nac » 3 nacl (Expand Search), _ nac (Expand Search), a nac (Expand Search)
5 y » 5 yl (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 complicada en net ) or ((( 5 y complejo tran ngo ) or ( 3 nac cony carlos neto ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( j l complicada en net ) OR ((( 5 y complejo tran ngo ) OR ( 3 nac cony carlos neto ))))*.