Perhaps you should try some spelling variations:
nhung dong » nhung don, nhung cong, nhung dung
hien xanh » hien hanh, hien nhanh, chieu xanh
trang van » trang va, trong van, tang van
tran van » luan van
dong nam » dong ha, dong tai, dong va
tang ban » tang bang, tiang ban, tang van
hang tai » hang va, dung tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - hanh ((trang van) or (tran van)) nhung dong nam ((tang ban) or (hang tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((trang van) OR (tran van)) nhung dong nam ((tang ban) OR (hang tai)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((trang van) or (tran van)) nhung dong nam ((tang ban) or (hang tai))*.