Talvez deva tentar algumas variações de ortografia:
metal complex » metal complexes (Expandir a Pesquisa)
carlos zavala » carlos ayala (Expandir a Pesquisa), carlos zapata (Expandir a Pesquisa), cortes zavala (Expandir a Pesquisa)
complex tran » complex trans (Expandir a Pesquisa), complex than (Expandir a Pesquisa), complex trait (Expandir a Pesquisa)
comes colon » does colon (Expandir a Pesquisa), complex colon (Expandir a Pesquisa), causes colon (Expandir a Pesquisa)
colon need » common need (Expandir a Pesquisa), coli need (Expandir a Pesquisa), colon new (Expandir a Pesquisa)
kno carlos » knopf carlos (Expandir a Pesquisa), cano carlos (Expandir a Pesquisa), nino carlos (Expandir a Pesquisa)
natl kno » nacl kno (Expandir a Pesquisa)
5 metal » 5 metil (Expandir a Pesquisa), 5 methyl (Expandir a Pesquisa)
3 natl » 3 nacl (Expandir a Pesquisa), 3 nail (Expandir a Pesquisa), _ natl (Expandir a Pesquisa)
ngoc » ngo (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 _ comes colon need ) or ((( 5 metal complex tran ngoc ) or ( 3 natl kno carlos zavala ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j _ comes colon need ) OR ((( 5 metal complex tran ngoc ) OR ( 3 natl kno carlos zavala )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j _ comes colon need ) or ((( 5 metal complex tran ngoc ) or ( 3 natl kno carlos zavala ))))*.