Talvez deva tentar algumas variações de ortografia:
matter where » matter when (Expandir a Pesquisa), matter whether (Expandir a Pesquisa), matters when (Expandir a Pesquisa)
cancer where » cancer who (Expandir a Pesquisa), cancer what (Expandir a Pesquisa)
matter chern » matter cheryl (Expandir a Pesquisa), matter modern (Expandir a Pesquisa), matter cover (Expandir a Pesquisa)
beier viola » lanier viola (Expandir a Pesquisa), dreyer viola (Expandir a Pesquisa)
maier biol » maier viola (Expandir a Pesquisa), maier i.l (Expandir a Pesquisa), maier il (Expandir a Pesquisa)
viola res » viola reyes (Expandir a Pesquisa), viola reka (Expandir a Pesquisa), viola rose (Expandir a Pesquisa)
j matter » j mattera (Expandir a Pesquisa), j mattern (Expandir a Pesquisa), j mather (Expandir a Pesquisa)
c beier » c beir (Expandir a Pesquisa), c becker (Expandir a Pesquisa), c behera (Expandir a Pesquisa)
chern b » chern m (Expandir a Pesquisa), chern c (Expandir a Pesquisa), chern h (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 ((matter where) OR (cancer where)) c beier viola res ) or ( j matter chern b maier biol res ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j ((matter where) OR (cancer where)) c beier viola res ) OR ( j matter chern b maier biol res )).
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j ((matter where) OR (cancer where)) c beier viola res ) or ( j matter chern b maier biol res ))".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j ((matter where) OR (cancer where)) c beier viola res ) or ( j matter chern b maier biol res ))*.