Talvez deva tentar algumas variações de ortografia:
complex connects » complex concepts (Expandir a Pesquisa), complex connection (Expandir a Pesquisa), complex connective (Expandir a Pesquisa)
agent complex » latent complex (Expandir a Pesquisa), rent complex (Expandir a Pesquisa), arnt complex (Expandir a Pesquisa)
carlos nejar » carlos negrao (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos neri (Expandir a Pesquisa)
cano carlos » luciano carlos (Expandir a Pesquisa), bacino carlos (Expandir a Pesquisa), solano carlos (Expandir a Pesquisa)
connects a » connects _ (Expandir a Pesquisa), connects dna (Expandir a Pesquisa)
nacl cano » nacl nano (Expandir a Pesquisa), nacl caso4 (Expandir a Pesquisa), nacl cacl (Expandir a Pesquisa)
0.9 nacl » 3.5 nacl (Expandir a Pesquisa)
covid e » covid en (Expandir a Pesquisa), covid et (Expandir a Pesquisa), covid _ (Expandir a Pesquisa)
5 agent » _ agent (Expandir a Pesquisa), 1 agent (Expandir a Pesquisa), 2 agent (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 covid e ) or ((( 5 agent complex connects a ) or ( 0.9 nacl cano carlos nejar ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ combat covid e ) OR ((( 5 agent complex connects a ) OR ( 0.9 nacl cano carlos nejar )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combat covid e ) or ((( 5 agent complex connects a ) or ( 0.9 nacl cano carlos nejar ))))*.