Talvez deva tentar algumas variações de ortografia:
carlos medina » carlos mejia (Expandir a Pesquisa)
complex tract » complex trait (Expandir a Pesquisa), complex trace (Expandir a Pesquisa), complex extract (Expandir a Pesquisa)
serna carlos » pena carlos (Expandir a Pesquisa), penna carlos (Expandir a Pesquisa), mena carlos (Expandir a Pesquisa)
pal complex » apical complex (Expandir a Pesquisa), metal complex (Expandir a Pesquisa), basal complex (Expandir a Pesquisa)
comes john » combes john (Expandir a Pesquisa), coles john (Expandir a Pesquisa), tomes john (Expandir a Pesquisa)
tract ngoc » tran ngoc (Expandir a Pesquisa), thach ngoc (Expandir a Pesquisa), tram ngoc (Expandir a Pesquisa)
john new » john agnew (Expandir a Pesquisa), john neil (Expandir a Pesquisa), john n (Expandir a Pesquisa)
3.5 nacl » 0.9 nacl (Expandir a Pesquisa)
l comes » l comps (Expandir a Pesquisa), l coles (Expandir a Pesquisa), l comas (Expandir a Pesquisa)
5 pal » 5 palm (Expandir a Pesquisa), _ pal (Expandir a Pesquisa), k pal (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 comes john new ) or ((( 5 pal complex tract ngoc ) or ( 3.5 nacl serna carlos medina ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l comes john new ) OR ((( 5 pal complex tract ngoc ) OR ( 3.5 nacl serna carlos medina )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l comes john new ) or ((( 5 pal complex tract ngoc ) or ( 3.5 nacl serna carlos medina ))))*.