Talvez deva tentar algumas variações de ortografia:
recurrent series » recurrent serious (Expandir a Pesquisa), recurrent serous (Expandir a Pesquisa), current series (Expandir a Pesquisa)
series cross » species cross (Expandir a Pesquisa), serial cross (Expandir a Pesquisa), series case (Expandir a Pesquisa)
1 recurrent » _ recurrent (Expandir a Pesquisa), a recurrent (Expandir a Pesquisa), 2 recurrent (Expandir a Pesquisa)
cross dis » cross d.s (Expandir a Pesquisa), across disk (Expandir a Pesquisa), cross daisy (Expandir a Pesquisa)
ben nerve » bent nerve (Expandir a Pesquisa), when nerve (Expandir a Pesquisa), open nerve (Expandir a Pesquisa)
nerve cat » nerve can (Expandir a Pesquisa), nerve ct (Expandir a Pesquisa), nerve cut (Expandir a Pesquisa)
cat dis » cat did (Expandir a Pesquisa), cat diets (Expandir a Pesquisa), cat bias (Expandir a Pesquisa)
j beta » j beth (Expandir a Pesquisa)
m ben » _ ben (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: (( 1 recurrent series cross dis ) or ((( m ben nerve cat dis ) or ( j beta nerve cat dis ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( 1 recurrent series cross dis ) OR ((( m ben nerve cat dis ) OR ( j beta nerve cat dis )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( 1 recurrent series cross dis ) or ((( m ben nerve cat dis ) or ( j beta nerve cat dis ))))*.