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)
nino carlos » cano carlos (Expandir a Pesquisa), bacino carlos (Expandir a Pesquisa), semino carlos (Expandir a Pesquisa)
combs john » coombs john (Expandir a Pesquisa), coombes john (Expandir a Pesquisa), hobbs john (Expandir a Pesquisa)
john neetu » john reetu (Expandir a Pesquisa), john neetha (Expandir a Pesquisa), john neena (Expandir a Pesquisa)
tried ngoc » trieu ngoc (Expandir a Pesquisa), trinh ngoc (Expandir a Pesquisa), thien ngoc (Expandir a Pesquisa)
carlos noa » carlos nodal (Expandir a Pesquisa), carlos nava (Expandir a Pesquisa), carlos nara (Expandir a Pesquisa)
nacl nino » nacl nano (Expandir a Pesquisa), nacl kno (Expandir a Pesquisa), nacl mno (Expandir a Pesquisa)
3.5 nacl » 0.9 nacl (Expandir a Pesquisa), 3 nacl (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 _ combs john neetu ) OR ((( 5 metal complex tried ngoc ) OR ( 3.5 nacl nino carlos noa ))))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j _ combs john neetu ) OR ((( 5 metal complex tried ngoc ) OR ( 3.5 nacl nino carlos noa ))))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ combs john neetu ) OR ((( 5 metal complex tried ngoc ) OR ( 3.5 nacl nino carlos noa ))))*.