Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hieu cach » hieu cac, chieu sach, hieu ca
van nhung » van nhuong, va nhung, van hung
tung van » trung van, tang van, dung van
cong dan » cong san, cong tan, huong dan
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu cach) OR (thien hach)) - thanh tung van nhung cong dan ((toan tai) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cach) or (thien hach)) - thanh tung van nhung cong dan ((toan tai) or (toan ban))*.