Talvez deva tentar algumas variações de ortografia:
negative systemic » active systemic (Expandir a Pesquisa)
patients negative » patients relatives (Expandir a Pesquisa), patients positive (Expandir a Pesquisa)
mental nerve » ventral nerve (Expandir a Pesquisa), central nerve (Expandir a Pesquisa), renal nerve (Expandir a Pesquisa)
systemic dis » systemic does (Expandir a Pesquisa), systemic dose (Expandir a Pesquisa), systemic dna (Expandir a Pesquisa)
cent nerve » bent nerve (Expandir a Pesquisa), recent nerve (Expandir a Pesquisa), crest nerve (Expandir a Pesquisa)
j patients » j patient (Expandir a Pesquisa)
j mental » j mengual (Expandir a Pesquisa), j mena (Expandir a Pesquisa), j mehta (Expandir a Pesquisa)
nerve a » nerve _ (Expandir a Pesquisa)
j cent » a cent (Expandir a Pesquisa), i cent (Expandir a Pesquisa), j center (Expandir a Pesquisa)
a due » _ due (Expandir a Pesquisa), a dye (Expandir a Pesquisa), i due (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 cent nerve a due ) or ((( j mental nerve a due ) or ( j patients negative systemic dis ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j cent nerve a due ) OR ((( j mental nerve a due ) OR ( j patients negative systemic dis )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j cent nerve a due ) or ((( j mental nerve a due ) or ( j patients negative systemic dis ))))*.