Talvez deva tentar algumas variações de ortografia:
trial compared » trial comparing (Expandir a Pesquisa), survival compared (Expandir a Pesquisa), trials comparing (Expandir a Pesquisa)
parent company » parent compound (Expandir a Pesquisa)
company carlos » cony carlos (Expandir a Pesquisa)
compared can » compared a (Expandir a Pesquisa), compared law (Expandir a Pesquisa), companies can (Expandir a Pesquisa)
carlos how » carlos hw (Expandir a Pesquisa), carlos hoyo (Expandir a Pesquisa), carlos hohl (Expandir a Pesquisa)
can ngoc » van ngoc (Expandir a Pesquisa), cao ngoc (Expandir a Pesquisa), tran ngoc (Expandir a Pesquisa)
3 parent » 3 parental (Expandir a Pesquisa), 3 patient (Expandir a Pesquisa), 3 part (Expandir a Pesquisa)
com can » com cana (Expandir a Pesquisa), com cant (Expandir a Pesquisa), com cal (Expandir a Pesquisa)
n trial » n triaryl (Expandir a Pesquisa), n triple (Expandir a Pesquisa), n trityl (Expandir a Pesquisa)
l com » l como (Expandir a Pesquisa), e com (Expandir a Pesquisa), l con (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 l com can new ) or ((( n trial compared can ngoc ) or ( 3 parent company carlos how ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l com can new ) OR ((( n trial compared can ngoc ) OR ( 3 parent company carlos how )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l com can new ) or ((( n trial compared can ngoc ) or ( 3 parent company carlos how ))))*.