Talvez deva tentar algumas variações de ortografia:
complex thin » complex than (Expandir a Pesquisa), complex within (Expandir a Pesquisa), complex trait (Expandir a Pesquisa)
carlos nejar » carlos negrao (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa)
campo ancon » campo andion (Expandir a Pesquisa), campo antoni (Expandir a Pesquisa), campo con (Expandir a Pesquisa)
oil complex » cell complex (Expandir a Pesquisa)
kcl carlos » del carlos (Expandir a Pesquisa), el carlos (Expandir a Pesquisa), gal carlos (Expandir a Pesquisa)
ancon net » anion net (Expandir a Pesquisa), ancora net (Expandir a Pesquisa), con net (Expandir a Pesquisa)
thin ngo » thien ngo (Expandir a Pesquisa), thinh ngo (Expandir a Pesquisa), thi ngo (Expandir a Pesquisa)
0.9 natl » 0.9 nacl (Expandir a Pesquisa)
natl kcl » nacl kcl (Expandir a Pesquisa)
e campo » de campo (Expandir a Pesquisa), e campos (Expandir a Pesquisa)
c oil » _ oil (Expandir a Pesquisa), l oil (Expandir a Pesquisa), i oil (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 e campo ancon net ) OR ((( c oil complex thin ngo ) OR ( 0.9 natl kcl carlos nejar ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j e campo ancon net ) OR ((( c oil complex thin ngo ) OR ( 0.9 natl kcl carlos nejar ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j e campo ancon net ) OR ((( c oil complex thin ngo ) OR ( 0.9 natl kcl carlos nejar ))))*.