Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
hoc thien » hoc hien, hoc thieu, hoc thiet
chinh tai » chinh tri
tai nhung » thai nhung, thi nhung, tai hung
van toan » van tuan, van tan, van thanh
ban than » ban thanh, van thanh, ban hang

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