Perhaps you should try some spelling variations:
thanh trang » thanh trung, hanh trang, thanh thang
chieu tinh » trieu tinh, lieu tinh, chau tinh
hieu tinh » lieu tinh, kieu tinh, hieu binh
dung cong » dung trong
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
khan cap » than cap, khoan cam, phan cac
va dung » van dung, va duong, vat dung
khan ap » han ap, khan dam

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