Perhaps you should try some spelling variations:
thanh truong » thanh trung, thanh thuong, thanh tung
thiet tach » chiet tach, thuat tach
thien hach » thien thanh, hien hanh
truong cao » truong dai
han cong » phan cong, hang cong, hanh cong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
cao han » cao nhan, cao phan, cao van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thiet tach) OR (thien hach)) - thanh truong cao han cong dan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thiet tach) OR (thien hach)) - thanh truong cao han cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet tach) OR (thien hach)) - thanh truong cao han cong dan than cau*.