Perhaps you should try some spelling variations:
thanh trung » thanh tung
thanh trang » hanh trang, thanh thang, thanh tran
chieu tinh » trieu tinh, lieu tinh, chau tinh
hieu tinh » lieu tinh, kieu tinh, hieu binh
trong tan » trong quan, trong cac, trong ca
tan khan » tan khang, tan nhan, toan khoan
khan cap » khan ap, than cap, khoan cam
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu tinh) or (chieu tinh)) - ((thanh trang) OR (thanh trung)) va dung trong tan khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu tinh) OR (chieu tinh)) - ((thanh trang) OR (thanh trung)) va dung trong tan khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu tinh) or (chieu tinh)) - ((thanh trang) OR (thanh trung)) va dung trong tan khan cap".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu tinh) or (chieu tinh)) - ((thanh trang) OR (thanh trung)) va dung trong tan khan cap*.