Talvez deva tentar algumas variações de ortografia:
thoracic cardiovasc » thorac cardiovasc (Expandir a Pesquisa), thoracic cardiac (Expandir a Pesquisa), thoracic cardiovascular (Expandir a Pesquisa)
cardiovasc surg » cardiovasc surgery (Expandir a Pesquisa), cardiovasc sci (Expandir a Pesquisa)
semin thoracic » vein thoracic (Expandir a Pesquisa), benign thoracic (Expandir a Pesquisa), lamina thoracic (Expandir a Pesquisa)
surg pediatric » surgery pediatric (Expandir a Pesquisa), during pediatric (Expandir a Pesquisa), survey pediatric (Expandir a Pesquisa)
pediatric care » pediatric case (Expandir a Pesquisa), pediatric cancer (Expandir a Pesquisa), pediatric cardiac (Expandir a Pesquisa)
care surg » care surge (Expandir a Pesquisa), care sural (Expandir a Pesquisa), care sars (Expandir a Pesquisa)
surg anna » berg anna (Expandir a Pesquisa), borg anna (Expandir a Pesquisa), birg anna (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: semin thoracic cardiovasc surg pediatric care surg anna~.