Talvez deva tentar algumas variações de ortografia:
adults observed » adults served (Expandir a Pesquisa), products observed (Expandir a Pesquisa)
observed cost » observed post (Expandir a Pesquisa), observed close (Expandir a Pesquisa), observed case (Expandir a Pesquisa)
benham merve » bayram merve (Expandir a Pesquisa), senem merve (Expandir a Pesquisa)
crest drive » crest derived (Expandir a Pesquisa), forest drive (Expandir a Pesquisa), test drive (Expandir a Pesquisa)
system dis » system dias (Expandir a Pesquisa), system dcs (Expandir a Pesquisa), system di (Expandir a Pesquisa)
cost does » test does (Expandir a Pesquisa), cost due (Expandir a Pesquisa), fast does (Expandir a Pesquisa)
merve can » nerve can (Expandir a Pesquisa)
j benham » _ benham (Expandir a Pesquisa), j burnham (Expandir a Pesquisa)
a crest » _ crest (Expandir a Pesquisa), a creusot (Expandir a Pesquisa), a crespo (Expandir a Pesquisa)
can dce » can de (Expandir a Pesquisa), can dcs (Expandir a Pesquisa), can dance (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: (( a crest drive system dis ) or ((( j adults observed cost does ) or ( j benham merve can dce ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( a crest drive system dis ) OR ((( j adults observed cost does ) OR ( j benham merve can dce )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( a crest drive system dis ) or ((( j adults observed cost does ) or ( j benham merve can dce ))))*.