Talvez deva tentar algumas variações de ortografia:
cranial serve » cranial nerve (Expandir a Pesquisa), cranial nerves (Expandir a Pesquisa), cranial shape (Expandir a Pesquisa)
mrnas serves » mrnas serve (Expandir a Pesquisa), rnas serve (Expandir a Pesquisa), mirnas serve (Expandir a Pesquisa)
benzo serve » benzo serena (Expandir a Pesquisa)
serves cat » serves a (Expandir a Pesquisa), nerves can (Expandir a Pesquisa), services can (Expandir a Pesquisa)
cat diets » fat diets (Expandir a Pesquisa), salt diets (Expandir a Pesquisa), cattle diets (Expandir a Pesquisa)
i cranial » _ cranial (Expandir a Pesquisa), a cranial (Expandir a Pesquisa), vii cranial (Expandir a Pesquisa)
serve can » nerve can (Expandir a Pesquisa), merve can (Expandir a Pesquisa), service can (Expandir a Pesquisa)
b mrnas » _ mrnas (Expandir a Pesquisa), b mrna (Expandir a Pesquisa), 1 mrnas (Expandir a Pesquisa)
can dcs » can tdcs (Expandir a Pesquisa), can dce (Expandir a Pesquisa), can dags (Expandir a Pesquisa)
j benzo » j bento (Expandir a Pesquisa), j benito (Expandir a Pesquisa), j benton (Expandir a Pesquisa)
serve a » serve _ (Expandir a Pesquisa), nerve a (Expandir a Pesquisa), herve a (Expandir a Pesquisa)
a diets » a dietas (Expandir a Pesquisa), a diet's (Expandir a Pesquisa), a dinets (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(((( b mrnas serves cat diets ) OR ( i cranial serve can dcs ))) OR ( j benzo serve a diets ))~".
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( b mrnas serves cat diets ) OR ( i cranial serve can dcs ))) OR ( j benzo serve a diets ))*.