Talvez deva tentar algumas variações de ortografia:
years compared » users compared (Expandir a Pesquisa), years comparison (Expandir a Pesquisa)
compared yeast » combined yeast (Expandir a Pesquisa), complex yeast (Expandir a Pesquisa), coated yeast (Expandir a Pesquisa)
computer case » computer based (Expandir a Pesquisa), computer code (Expandir a Pesquisa), computer can (Expandir a Pesquisa)
narr compared » nmr compared (Expandir a Pesquisa), tavr compared (Expandir a Pesquisa), laser compared (Expandir a Pesquisa)
nat computer » cat computer (Expandir a Pesquisa), fast computer (Expandir a Pesquisa), icat computer (Expandir a Pesquisa)
yeast new » east new (Expandir a Pesquisa), yeast n (Expandir a Pesquisa), yeast nad (Expandir a Pesquisa)
case non » cause non (Expandir a Pesquisa), case note (Expandir a Pesquisa), use non (Expandir a Pesquisa)
4 years » 2 years (Expandir a Pesquisa), 4 year (Expandir a Pesquisa), 10 years (Expandir a Pesquisa)
e nat » e nata (Expandir a Pesquisa), e nao (Expandir a Pesquisa), e nas (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: (( e nat computer case non ) or ((( 4 years compared yeast new ) or ( l narr compared _ non ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( e nat computer case non ) OR ((( 4 years compared yeast new ) OR ( l narr compared _ non )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( e nat computer case non ) or ((( 4 years compared yeast new ) or ( l narr compared _ non ))))*.