Three Asian artworks

Quick snaps of 3 works of art I need to get more info on... comments allowed on this page if anyone
can give me any help... Intend to sell them but will make better images before listing.

Actual print size 11 x 9 1/2 - framed and matted... a poor photo - down and dirty just to show someone quickly..
signature

signature for preceding work
Back of the frameed Ngo DinhChao(sp?) framing

Asian print - woodlands Actual print size 11 x 9 1/2 - framed and matted... a poor photo - down and dirty just to show someone quickly..

signature close-up woodland and river scene

Small (41/2x 1/2 approx of actual work Vietnamese artist.. Ngo Dinh Ch.... See next photo for sig closeup and back