Talvez deva tentar algumas variações de ortografia:
complex trex » complex tree (Expandir a Pesquisa), complex tetrex (Expandir a Pesquisa), complex text (Expandir a Pesquisa)
tio2 carlos » tio2 carbon (Expandir a Pesquisa)
comps john » copps john (Expandir a Pesquisa), combs john (Expandir a Pesquisa), camps johan (Expandir a Pesquisa)
carlos noe » carlos noel (Expandir a Pesquisa), carlos noa (Expandir a Pesquisa), carlos nojek (Expandir a Pesquisa)
2 several » _ several (Expandir a Pesquisa), a several (Expandir a Pesquisa), 2 severely (Expandir a Pesquisa)
trex ngoc » trieu ngoc (Expandir a Pesquisa), tran ngoc (Expandir a Pesquisa), tien ngoc (Expandir a Pesquisa)
nacl tio2 » nacl co2 (Expandir a Pesquisa), agcl tio2 (Expandir a Pesquisa), nacl ion (Expandir a Pesquisa)
john noe » john noel (Expandir a Pesquisa), john noh (Expandir a Pesquisa), john noble (Expandir a Pesquisa)
7.5 nacl » 3.5 nacl (Expandir a Pesquisa), 0.9 nacl (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 comps john noe ) or ((( 2 several complex trex ngoc ) or ( 7.5 nacl tio2 carlos noe ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j m comps john noe ) OR ((( 2 several complex trex ngoc ) OR ( 7.5 nacl tio2 carlos noe )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j m comps john noe ) or ((( 2 several complex trex ngoc ) or ( 7.5 nacl tio2 carlos noe ))))*.