Perhaps you should try some spelling variations:
ventral nerve » femoral nerve (Expand Search)
crest derived » host derived (Expand Search)
nepal system » pal system (Expand Search), fetal system (Expand Search), general system (Expand Search)
derived cast » derived mast (Expand Search), derived cat (Expand Search), derived fast (Expand Search)
j central » 1hfj central (Expand Search)
system de » system der (Expand Search), system delay (Expand Search)
2 ventral » _ ventral (Expand Search), a ventral (Expand Search)
cast dis » cast des (Expand Search), cast die (Expand Search), chest dis (Expand Search)
i crest » i crestr (Expand Search), _ crest (Expand Search), a crest (Expand Search)
nerve i » nerve _ (Expand Search), nerve a (Expand Search)
i due » _ due (Expand Search), i die (Expand Search), 2 due (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 central nepal system de ) or ( i crest derived cast dis ))) or ( 2 ventral nerve i due ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( j central nepal system de ) OR ( i crest derived cast dis ))) OR ( 2 ventral nerve i due )).
• Adding a wildcard symbol may retrieve word variants: (((( j central nepal system de ) or ( i crest derived cast dis ))) or ( 2 ventral nerve i due ))*.