Talvez deva tentar algumas variações de ortografia:
complex tried » complex trial (Expandir a Pesquisa), complex third (Expandir a Pesquisa), complex tree (Expandir a Pesquisa)
metal complex » metal complexes (Expandir a Pesquisa)
carlos nejar » carlos negrao (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa)
comps john » copps john (Expandir a Pesquisa), combs john (Expandir a Pesquisa), camps johan (Expandir a Pesquisa)
tried ngoc » trieu ngoc (Expandir a Pesquisa), trinh ngoc (Expandir a Pesquisa), thien ngoc (Expandir a Pesquisa)
rao carlos » sao carlos (Expandir a Pesquisa), cao carlos (Expandir a Pesquisa), romao carlos (Expandir a Pesquisa)
john net » john new (Expandir a Pesquisa), john neetu (Expandir a Pesquisa), john asnet (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (Expandir a Pesquisa)
nacl rao » nacl nano (Expandir a Pesquisa), nacl naoh (Expandir a Pesquisa), nacl a (Expandir a Pesquisa)
l comps » m comps (Expandir a Pesquisa)
5 metal » 5 metil (Expandir a Pesquisa), 5 methyl (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 l comps john net ) or ((( 5 metal complex tried ngoc ) or ( 7.5 nacl rao carlos nejar ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l comps john net ) OR ((( 5 metal complex tried ngoc ) OR ( 7.5 nacl rao carlos nejar )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l comps john net ) or ((( 5 metal complex tried ngoc ) or ( 7.5 nacl rao carlos nejar ))))*.