Perhaps you should try some spelling variations:
thanh trung » thanh tung
thien hach » thien thanh, hien hanh
tran thanh » ban thanh, van thanh, quan thanh
thanh phan » thanh pho, thanh san, thanh toan
dang cong » dung cong
cong tran » cong tan, cong tuan, cong toan
hieu cac » hieu luc, hieu va, hieu van
trung va » truong va, trang va, trung ha
va dang » van dang, va nang, va 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) or (hieu cac)) - thanh trung va dang cong tran thanh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (hieu cac)) - thanh trung va dang cong tran thanh phan.
• Adding a wildcard symbol may retrieve word variants: hoc ((thien hach) or (hieu cac)) - thanh trung va dang cong tran thanh phan*.