Perhaps you should try some spelling variations:
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, mot chieu
xa truong » cac truong
va truong » van truong, va thuong, va tuong
ho chieu » theo chieu, hoc thieu, mot chieu
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chieu)) tinh - thanh tung ((xa truong) or (va truong)) cong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) tinh - thanh tung ((xa truong) OR (va truong)) cong dan than tap.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chieu)) tinh - thanh tung ((xa truong) or (va truong)) cong dan than tap*.