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 common » combat colon (Expandir a Pesquisa), common common (Expandir a Pesquisa), format common (Expandir a Pesquisa)
common need » common needs (Expandir a Pesquisa), common reed (Expandir a Pesquisa), common weed (Expandir a Pesquisa)
hat complex » heart complex (Expandir a Pesquisa), hat complexes (Expandir a Pesquisa), coat complex (Expandir a Pesquisa)
nino carlos » cano carlos (Expandir a Pesquisa), bacino carlos (Expandir a Pesquisa), semino carlos (Expandir a Pesquisa)
carlos nar » carlos nara (Expandir a Pesquisa), carlos nejar (Expandir a Pesquisa), carlos nardi (Expandir a Pesquisa)
nacl nino » nacl nano (Expandir a Pesquisa), nacl kno (Expandir a Pesquisa), nacl mno (Expandir a Pesquisa)
a combat » _ combat (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
5 hat » 5 heat (Expandir a Pesquisa), _ hat (Expandir a Pesquisa), 5 htt (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 a combat common need ) or ((( 5 hat complex concept _ ) or ( 7.5 nacl nino carlos nar ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j a combat common need ) OR ((( 5 hat complex concept _ ) OR ( 7.5 nacl nino carlos nar )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j a combat common need ) or ((( 5 hat complex concept _ ) or ( 7.5 nacl nino carlos nar ))))*.