Talvez deva tentar algumas variações de ortografia:
complex trad » complex trait (Expandir a Pesquisa), complex trial (Expandir a Pesquisa), complex trans (Expandir a Pesquisa)
oil complex » novel complex (Expandir a Pesquisa), model complex (Expandir a Pesquisa), cell complex (Expandir a Pesquisa)
campo anion » campo andion (Expandir a Pesquisa), campo ancon (Expandir a Pesquisa), campo antoni (Expandir a Pesquisa)
carlos noa » carlos nodal (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos nara (Expandir a Pesquisa)
anion net » anion bedt (Expandir a Pesquisa), anion na (Expandir a Pesquisa), anion ni2 (Expandir a Pesquisa)
trad hugo » tran hugo (Expandir a Pesquisa), strand hugo (Expandir a Pesquisa), prado hugo (Expandir a Pesquisa)
nacl juan » nacl un (Expandir a Pesquisa)
al campo » el campo (Expandir a Pesquisa), del campo (Expandir a Pesquisa), al cambio (Expandir a Pesquisa)
3.5 nacl » 0.9 nacl (Expandir a Pesquisa)
l oil » _ oil (Expandir a Pesquisa)
j al » j a (Expandir a Pesquisa), j l (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 al campo anion net ) OR ((( l oil complex trad hugo ) OR ( 3.5 nacl juan carlos noa ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j al campo anion net ) OR ((( l oil complex trad hugo ) OR ( 3.5 nacl juan carlos noa ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j al campo anion net ) OR ((( l oil complex trad hugo ) OR ( 3.5 nacl juan carlos noa ))))*.