Talvez deva tentar algumas variações de ortografia:
complex concept » complex concepts (Expandir a Pesquisa), complex context (Expandir a Pesquisa), complex connects (Expandir a Pesquisa)
ospina carlos » espinoza carlos (Expandir a Pesquisa), espinosa carlos (Expandir a Pesquisa), medina carlos (Expandir a Pesquisa)
icd complex » cd complex (Expandir a Pesquisa), id complex (Expandir a Pesquisa), iid complex (Expandir a Pesquisa)
nacl ospina » angel ospina (Expandir a Pesquisa)
carlos nara » carlos lara (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos jara (Expandir a Pesquisa)
hobbs john » hobbs jean (Expandir a Pesquisa)
concept n » concept _ (Expandir a Pesquisa), concept a (Expandir a Pesquisa), concept 2 (Expandir a Pesquisa)
john new » john agnew (Expandir a Pesquisa), john neil (Expandir a Pesquisa), john n (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
_ icd » _ icu (Expandir a Pesquisa), _ ice (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 _ hobbs john new ) or ((( _ icd complex concept n ) or ( 7.5 nacl ospina carlos nara ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ hobbs john new ) OR ((( _ icd complex concept n ) OR ( 7.5 nacl ospina carlos nara )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ hobbs john new ) or ((( _ icd complex concept n ) or ( 7.5 nacl ospina carlos nara ))))*.