Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
lang thang » cang thang, dang thanh, hung thang
phung cong » nhung cong, phong cong, nhung chong
hoc thien » hoc hien, hoc thieu, hoc thiet
nang hang » nang sang, hang hang, cang thang
va phung » va phuong, van phung, va nhung
cong dan » cong san, cong tan, huong dan
van chat » cao chat
dan van » dang van, doan van, dao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien hach - ((lang thang) or (nang hang)) va phung cong dan van chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - ((lang thang) OR (nang hang)) va phung cong dan van chat.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - ((lang thang) or (nang hang)) va phung cong dan van chat*.