Talvez deva tentar algumas variações de ortografia:
maier viola » lanier viola (Expandir a Pesquisa), beier viola (Expandir a Pesquisa), walter viola (Expandir a Pesquisa)
matos chen » matos caep (Expandir a Pesquisa), matos ceu (Expandir a Pesquisa), matos carmen (Expandir a Pesquisa)
j mather » j maher (Expandir a Pesquisa), j matthew (Expandir a Pesquisa), j mathews (Expandir a Pesquisa)
j mathew » j matthew (Expandir a Pesquisa), _ mathew (Expandir a Pesquisa), j matthews (Expandir a Pesquisa)
biol med » mol med (Expandir a Pesquisa), biol res (Expandir a Pesquisa)
j matos » j martos (Expandir a Pesquisa), j mattoso (Expandir a Pesquisa), j matias (Expandir a Pesquisa)
a maier » _ maier (Expandir a Pesquisa)
viola d » viola de (Expandir a Pesquisa), viola _ (Expandir a Pesquisa), viola a (Expandir a Pesquisa)
chen b » chen bin (Expandir a Pesquisa)
chen a » chen amy (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 mather) OR (j mathew)) chen b maier biol med ) OR ( j matos chen a maier viola d ))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( ((j mather) OR (j mathew)) chen b maier biol med ) OR ( j matos chen a maier viola d ))*".