Talvez deva tentar algumas variações de ortografia:
complex tran » complex trans (Expandir a Pesquisa), complex than (Expandir a Pesquisa), complex trait (Expandir a Pesquisa)
msi complex » fsi complex (Expandir a Pesquisa), fmri complex (Expandir a Pesquisa), ii complex (Expandir a Pesquisa)
carlos now » carlos noa (Expandir a Pesquisa), carlos noe (Expandir a Pesquisa), carlos novo (Expandir a Pesquisa)
null leon » null lesion (Expandir a Pesquisa), brull leon (Expandir a Pesquisa), null lens (Expandir a Pesquisa)
oil does » oil diets (Expandir a Pesquisa), oil drops (Expandir a Pesquisa), oil diet (Expandir a Pesquisa)
does how » does home (Expandir a Pesquisa), does host (Expandir a Pesquisa), does hiv (Expandir a Pesquisa)
3 null » _ null (Expandir a Pesquisa), a null (Expandir a Pesquisa), 1 null (Expandir a Pesquisa)
j oil » _ oil (Expandir a Pesquisa), l oil (Expandir a Pesquisa), i oil (Expandir a Pesquisa)
2 msi » _ msi (Expandir a Pesquisa), 2 mri (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j oil does how new ) OR ((( 2 msi complex tran n ) OR ( 3 null leon carlos now ))))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j oil does how new ) OR ((( 2 msi complex tran n ) OR ( 3 null leon carlos now ))))*.