Talvez deva tentar algumas variações de ortografia:
letters liver » letter liver (Expandir a Pesquisa), letters never (Expandir a Pesquisa), letters vive (Expandir a Pesquisa)
antral nerve » ventral nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa), animal nerve (Expandir a Pesquisa)
benign beale » benign bile (Expandir a Pesquisa), benign base (Expandir a Pesquisa), benign breast (Expandir a Pesquisa)
pig antral » pig atrial (Expandir a Pesquisa), pig animal (Expandir a Pesquisa), pig antrum (Expandir a Pesquisa)
beale cyst » female cyst (Expandir a Pesquisa), base cyst (Expandir a Pesquisa), bile cyst (Expandir a Pesquisa)
nerve can » nerve canal (Expandir a Pesquisa), nerve case (Expandir a Pesquisa), nerve a (Expandir a Pesquisa)
cyst dis » cyst due (Expandir a Pesquisa), cyst d (Expandir a Pesquisa)
j benign » j benigno (Expandir a Pesquisa), _ benign (Expandir a Pesquisa), a benign (Expandir a Pesquisa)
can dcs » can tdcs (Expandir a Pesquisa), can dce (Expandir a Pesquisa), can dags (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: (((( _ letters liver cyst dis ) OR ( pig antral nerve can dcs ))) OR ( j benign beale cyst dis ))~.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( _ letters liver cyst dis ) OR ( pig antral nerve can dcs ))) OR ( j benign beale cyst dis ))*".