Talvez deva tentar algumas variações de ortografia:
methyl complexes » metal complexes (Expandir a Pesquisa), metall complexes (Expandir a Pesquisa), methylase complexes (Expandir a Pesquisa)
complexes tuan » complexes thin (Expandir a Pesquisa), complexes tuning (Expandir a Pesquisa), complexes total (Expandir a Pesquisa)
abrao carlos » cabral carlos (Expandir a Pesquisa), abreu carlos (Expandir a Pesquisa), abril carlos (Expandir a Pesquisa)
carlos jara » carlos lara (Expandir a Pesquisa), carlos carla (Expandir a Pesquisa), carlos juca (Expandir a Pesquisa)
combs john » coombs john (Expandir a Pesquisa), coombes john (Expandir a Pesquisa), hobbs john (Expandir a Pesquisa)
john neil » johns neil (Expandir a Pesquisa), cohn neil (Expandir a Pesquisa), johnson neil (Expandir a Pesquisa)
tuan ngoc » tuanh ngoc (Expandir a Pesquisa), tran ngoc (Expandir a Pesquisa), xuan ngoc (Expandir a Pesquisa)
e combs » sex combs (Expandir a Pesquisa)
3 nucl » 3 null (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 e combs john neil ) or ((( 5 methyl complexes tuan ngoc ) or ( 3 nucl abrao carlos jara ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j e combs john neil ) OR ((( 5 methyl complexes tuan ngoc ) OR ( 3 nucl abrao carlos jara )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j e combs john neil ) or ((( 5 methyl complexes tuan ngoc ) or ( 3 nucl abrao carlos jara ))))*.