Perhaps you should try some spelling variations:
marcelo carlos » marcelo carvalho (Expand Search)
method complex » methods complex (Expand Search), method coupled (Expand Search), method complexity (Expand Search)
complex mixed » complex mirna (Expand Search), complex mixtures (Expand Search)
nacl marcelo » nacif marcelo (Expand Search), natal marcelo (Expand Search), paul marcelo (Expand Search)
carlos nora » carlos mora (Expand Search), carlos nara (Expand Search), carlos noa (Expand Search)
mixed ngoc » mixed non (Expand Search), mixed nop (Expand Search)
05 method » b05 method (Expand Search), 15 method (Expand Search), 5 method (Expand Search)
e combs » sex combs (Expand Search)
colin » colon (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 e combs colin a ) or ((( 05 method complex mixed ngoc ) or ( 3.5 nacl marcelo carlos nora ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( j e combs colin a ) OR ((( 05 method complex mixed ngoc ) OR ( 3.5 nacl marcelo carlos nora )))).
• Adding a wildcard symbol may retrieve word variants: (( j e combs colin a ) or ((( 05 method complex mixed ngoc ) or ( 3.5 nacl marcelo carlos nora ))))*.