Talvez deva tentar algumas variações de ortografia:
complex concept » complex concepts (Expandir a Pesquisa), complex context (Expandir a Pesquisa), complex connects (Expandir a Pesquisa)
combat colon » combat covid (Expandir a Pesquisa), combat boot (Expandir a Pesquisa)
hart complex » heart complex (Expandir a Pesquisa), hat complex (Expandir a Pesquisa), art complex (Expandir a Pesquisa)
nano carlos » cano carlos (Expandir a Pesquisa), nino carlos (Expandir a Pesquisa), nuno carlos (Expandir a Pesquisa)
carlos nar » carlos nara (Expandir a Pesquisa), carlos nejar (Expandir a Pesquisa), carlos nardi (Expandir a Pesquisa)
colon new » colony new (Expandir a Pesquisa), color new (Expandir a Pesquisa), colon need (Expandir a Pesquisa)
concept a » concept _ (Expandir a Pesquisa)
nacl nano » nacl kno (Expandir a Pesquisa), nacl nabr (Expandir a Pesquisa)
l combat » le combat (Expandir a Pesquisa), _ combat (Expandir a Pesquisa), a combat (Expandir a Pesquisa)
3.5 nacl » 0.9 nacl (Expandir a Pesquisa), 3 nacl (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Performing a fuzzy search may retrieve terms with similar spellings: (( j l combat colon new ) or ((( e hart complex concept a ) or ( 3.5 nacl nano carlos nar ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l combat colon new ) OR ((( e hart complex concept a ) OR ( 3.5 nacl nano carlos nar )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l combat colon new ) or ((( e hart complex concept a ) or ( 3.5 nacl nano carlos nar ))))*.