Perhaps you should try some spelling variations:
dimer complex » dimeric complex (Expand Search), pincer complex (Expand Search), under complex (Expand Search)
natal chiara » natale chiara (Expand Search), natali chiara (Expand Search), canal chiara (Expand Search)
nat compared » fat compared (Expand Search), rat compared (Expand Search), cat compared (Expand Search)
compared can » compared a (Expand Search), compared law (Expand Search), companies can (Expand Search)
complex can » complex case (Expand Search), complex care (Expand Search), complex cancer (Expand Search)
e natal » de natal (Expand Search), pre natal (Expand Search), e natural (Expand Search)
a dimer » _ dimer (Expand Search), a dimeric (Expand Search)
can non » dan non (Expand Search), than non (Expand Search)
c netw » c neto (Expand Search), soc netw (Expand Search)
j nat » j nart (Expand Search), _ nat (Expand Search), a nat (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: (((( e natal chiara c netw ) or ( j nat compared can new ))) or ( a dimer complex can non ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( e natal chiara c netw ) OR ( j nat compared can new ))) OR ( a dimer complex can non )).
• Adding a wildcard symbol may retrieve word variants: (((( e natal chiara c netw ) or ( j nat compared can new ))) or ( a dimer complex can non ))*.