Talvez deva tentar algumas variações de ortografia:
complex connects » complex concepts (Expandir a Pesquisa), complex connection (Expandir a Pesquisa), complex confers (Expandir a Pesquisa)
agent complex » latent complex (Expandir a Pesquisa), rent complex (Expandir a Pesquisa), fragment complex (Expandir a Pesquisa)
combat colon » combat covid (Expandir a Pesquisa), combat boot (Expandir a Pesquisa)
caso4 carlos » caso carlos (Expandir a Pesquisa), caro carlos (Expandir a Pesquisa), casal carlos (Expandir a Pesquisa)
carlos nejar » carlos negrao (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa)
connects _ » connections _ (Expandir a Pesquisa)
nacl caso4 » nacl na2so4 (Expandir a Pesquisa)
l combat » le combat (Expandir a Pesquisa), _ combat (Expandir a Pesquisa), a combat (Expandir a Pesquisa)
colon e » colon en (Expandir a Pesquisa), colon _ (Expandir a Pesquisa), colon a (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 e ) or ((( 5 agent complex connects _ ) or ( 0.9 nacl caso4 carlos nejar ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l combat colon e ) OR ((( 5 agent complex connects _ ) OR ( 0.9 nacl caso4 carlos nejar )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l combat colon e ) or ((( 5 agent complex connects _ ) or ( 0.9 nacl caso4 carlos nejar ))))*.