Talvez deva tentar algumas variações de ortografia:
complex tears » complex traits (Expandir a Pesquisa), complex trait (Expandir a Pesquisa), complex than (Expandir a Pesquisa)
cooper jason » cooper john (Expandir a Pesquisa), cooper alan (Expandir a Pesquisa), cooper james (Expandir a Pesquisa)
carlos rojek » carlos nojek (Expandir a Pesquisa), carlos rojas (Expandir a Pesquisa), carlos roger (Expandir a Pesquisa)
5 covalent » _ covalent (Expandir a Pesquisa), a covalent (Expandir a Pesquisa), i covalent (Expandir a Pesquisa)
kcl carlos » kuhl carlos (Expandir a Pesquisa), gil carlos (Expandir a Pesquisa), l carlos (Expandir a Pesquisa)
m cooper » _ cooper (Expandir a Pesquisa), i cooper (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
jason a » jason _ (Expandir a Pesquisa)
tears o » tears do (Expandir a Pesquisa), tears _ (Expandir a Pesquisa), tears 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 m cooper jason a ) or ((( 5 covalent complex tears o ) or ( 7.5 nacl kcl carlos rojek ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j m cooper jason a ) OR ((( 5 covalent complex tears o ) OR ( 7.5 nacl kcl carlos rojek )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j m cooper jason a ) or ((( 5 covalent complex tears o ) or ( 7.5 nacl kcl carlos rojek ))))*.