Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
thanh hang » thanh hoang, thanh thang, tranh hang
hoc thien » hoc hien, hoc thieu, hoc thiet
cong dan » cong san, cong tan, huong dan
toan cao » toan ban
toan tap » toan ban
va dang » van dang, va nang, da dang
va lang » va nang, hoa lang

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 - thanh hang ((va dang) or (va lang)) cong dan ((toan cao) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - thanh hang ((va dang) OR (va lang)) cong dan ((toan cao) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - thanh hang ((va dang) or (va lang)) cong dan ((toan cao) or (toan tap))*.