Talvez deva tentar algumas variações de ortografia:
thorac cardiovascular » thoracic cardiovascular (Expandir a Pesquisa), topic cardiovascular (Expandir a Pesquisa), track cardiovascular (Expandir a Pesquisa)
cardiovascular during » cardiovascular nursing (Expandir a Pesquisa), cardiovascular durante (Expandir a Pesquisa), cardiovascular scoring (Expandir a Pesquisa)
during pediatric » among pediatric (Expandir a Pesquisa)
pediatric care » pediatric case (Expandir a Pesquisa), pediatric cancer (Expandir a Pesquisa), pediatric cardiac (Expandir a Pesquisa)
semen thorac » semen than (Expandir a Pesquisa)
care fears » care farms (Expandir a Pesquisa), care sars (Expandir a Pesquisa), care farm (Expandir a Pesquisa)
fears annu » fear anna (Expandir a Pesquisa), sears ann (Expandir a Pesquisa), years ann (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: semen thorac cardiovascular during pediatric care fears annu~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: semen thorac cardiovascular during pediatric care fears annu*.