Perhaps you should try some spelling variations:
complex trial » complex atrial (Expand Search), complex tibial (Expand Search), complex tropical (Expand Search)
cano carlos » luciano carlos (Expand Search), bacino carlos (Expand Search), solano carlos (Expand Search)
carlos nora » carlos mora (Expand Search), carlos nara (Expand Search), carlos noa (Expand Search)
combs john » coombs john (Expand Search), combes john (Expand Search), coombes john (Expand Search)
co complex » o complex (Expand Search), tho complex (Expand Search), two complex (Expand Search)
trial ngoc » trinh ngoc (Expand Search), trial noa (Expand Search), trial neo (Expand Search)
nacl cano » nacl nano (Expand Search), nacl caso4 (Expand Search), nacl cacl (Expand Search)
john net » john new (Expand Search), john neetu (Expand Search), john asnet (Expand Search)
7.5 nacl » 3.5 nacl (Expand Search), 0.9 nacl (Expand Search)
l combs » e combs (Expand Search), _ combs (Expand Search), l comps (Expand Search)
5 co » 5 o (Expand Search), 5 c (Expand Search), 5 cm (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.

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( j l combs john net ) OR ((( 5 co complex trial ngoc ) OR ( 7.5 nacl cano carlos nora ))))~".
• Adding a wildcard symbol may retrieve word variants: (( j l combs john net ) OR ((( 5 co complex trial ngoc ) OR ( 7.5 nacl cano carlos nora ))))*.