Perhaps you should try some spelling variations:
knox charles » knott charles (Expand Search), cox charles (Expand Search), fox charles (Expand Search)
combe colin » combs colin (Expand Search), combe caroline (Expand Search), conine colin (Expand Search)
complex trs » complex tris (Expand Search), complex tears (Expand Search), complex trans (Expand Search)
charles noe » charles noble (Expand Search), charles nora (Expand Search), charles nfon (Expand Search)
mt complex » most complex (Expand Search), cst complex (Expand Search), ift complex (Expand Search)
colin new » coli new (Expand Search), colic new (Expand Search), colon new (Expand Search)
natl knox » paul knox (Expand Search)
trs ngoc » tra ngoc (Expand Search), tran ngoc (Expand Search), tram ngoc (Expand Search)
7.5 natl » 7.5 nacl (Expand Search), 3.5 nacl (Expand Search)
l combe » la combe (Expand Search), _ combe (Expand Search), l combs (Expand Search)
5 mt » 5 ht (Expand Search), _ mt (Expand Search), 5 mg (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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( j l combe colin new ) OR ((( 5 mt complex trs ngoc ) OR ( 7.5 natl knox charles noe ))))~.
• Adding a wildcard symbol may retrieve word variants: (( j l combe colin new ) or ((( 5 mt complex trs ngoc ) or ( 7.5 natl knox charles noe ))))*.