Perhaps you should try some spelling variations:
method complex » methods complex (Expand Search), method coupled (Expand Search), method complexity (Expand Search)
complex tien » complex times (Expand Search), complex than (Expand Search), complex time (Expand Search)
nino carlos » cano carlos (Expand Search), bacino carlos (Expand Search), semino carlos (Expand Search)
carlos now » carlos noe (Expand Search), carlos noa (Expand Search), carlos novo (Expand Search)
combs con » combs colin (Expand Search), combs john (Expand Search), combs cody (Expand Search)
tien ngoc » tran ngoc (Expand Search), diep ngoc (Expand Search), tuan ngoc (Expand Search)
nacl nino » nacl nano (Expand Search), nacl kno (Expand Search), nacl mno (Expand Search)
5 method » 5 methods (Expand Search), 5 methoxy (Expand Search), 5 methyl (Expand Search)
l combs » e combs (Expand Search), _ combs (Expand Search), l comps (Expand Search)
con new » icon new (Expand Search), con nee (Expand Search), con net (Expand Search)
3 nacl » _ nacl (Expand Search), 3.5 nacl (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 combs con new ) OR ((( 5 method complex tien ngoc ) OR ( 3 nacl nino carlos now ))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( j l combs con new ) OR ((( 5 method complex tien ngoc ) OR ( 3 nacl nino carlos now ))))".
• Adding a wildcard symbol may retrieve word variants: (( j l combs con new ) OR ((( 5 method complex tien ngoc ) OR ( 3 nacl nino carlos now ))))*.