Perhaps you should try some spelling variations:
complicada en » aplicada en (Expand Search), comparada en (Expand Search)
complejo tran » complejo tres (Expand Search), complejo craneo (Expand Search), complejo termal (Expand Search)
carlos newton » carlos nelson (Expand Search), carlos nieto (Expand Search), santos newton (Expand Search)
e complicada » _ complicada (Expand Search), la complicada (Expand Search), e complicated (Expand Search)
yl complejo » el complejo (Expand Search), al complejo (Expand Search), y complejo (Expand Search)
joly carlos » herly carlos (Expand Search)
tran ngo » tran ngoc (Expand Search), tran nho (Expand Search), tran nga (Expand Search)
en need » men need (Expand Search), en nee (Expand Search), dn need (Expand Search)
1 yl » 2 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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( j e complicada en need ) OR ((( 1 yl complejo tran ngo ) OR ( 3 a joly carlos newton ))))~.
• Adding a wildcard symbol may retrieve word variants: (( j e complicada en need ) or ((( 1 yl complejo tran ngo ) or ( 3 a joly carlos newton ))))*.