Perhaps you should try some spelling variations:
hung thang » cang thang, hung tran
nhung cong » dung cong, thong cong, hang cong
tieu xanh » tieu danh, chieu xanh, dieu hanh
nang hang » nang sang, hang hang, cang thang
ca nhung » cua nhung, cam nhung, va nhung
cong san » cong tac
san van » tan van, luan van, tran van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - ((nang hang) or (hung thang)) ca nhung cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - ((nang hang) OR (hung thang)) ca nhung cong san van ban.
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - ((nang hang) or (hung thang)) ca nhung cong san van ban*.