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)
akt complex » act complex (Expandir a Pesquisa), art complex (Expandir a Pesquisa), ast complex (Expandir a Pesquisa)
carlos nara » carlos lara (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos jara (Expandir a Pesquisa)
kno carlos » knopf carlos (Expandir a Pesquisa), cano carlos (Expandir a Pesquisa), nino carlos (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)
3.5 nacl » 0.9 nacl (Expandir a Pesquisa), 3 nacl (Expandir a Pesquisa)
nacl kno » nacl nano (Expandir a Pesquisa), nacl en (Expandir a Pesquisa), nacl kcl (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 _ combat colon new ) or ((( _ akt complex concept a ) or ( 3.5 nacl kno carlos nara ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ combat colon new ) OR ((( _ akt complex concept a ) OR ( 3.5 nacl kno carlos nara )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combat colon new ) or ((( _ akt complex concept a ) or ( 3.5 nacl kno carlos nara ))))*.