Perhaps you should try some spelling variations:
period compared » method compared (Expand Search), perfusion compared (Expand Search)
compared law » compared a (Expand Search), compared can (Expand Search), compared _ (Expand Search)
comme dans » homme dans (Expand Search), compte dans (Expand Search), femme dans (Expand Search)
comany law » company law (Expand Search), company's law (Expand Search)
dans ngoc » dang ngoc (Expand Search), dan ngoc (Expand Search), anh ngoc (Expand Search)
et comme » et comment (Expand Search)
j period » 19 period (Expand Search), j peris (Expand Search), j periam (Expand Search)
law none » law non (Expand Search), law note (Expand Search), law gone (Expand Search)
law new » jaw new (Expand Search)
j nat » j nart (Expand Search), _ nat (Expand Search), a nat (Expand Search)
j et » j e (Expand Search)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( j et comme dans ngoc ) or ((( j period compared law none ) or ( j nat comany law new ))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( j et comme dans ngoc ) OR ((( j period compared law none ) OR ( j nat comany law new )))).
• Adding a wildcard symbol may retrieve word variants: (( j et comme dans ngoc ) or ((( j period compared law none ) or ( j nat comany law new ))))*.