Perhaps you should try some spelling variations:
khong chang » khong cang, phong chong, hong thang
theo chieu » theo tieu, theo chu, thi chieu
luan khong » luan phong, luan phuong, luong khong
nang thanh » dang thanh, tang thanh, nhanh thanh
tang luan » dung luan
nang than » sang than, nang phan, nang han
ho chieu » hoc thieu, doi chieu, mot chieu
anh tang » anh bang, anh dang, anh nang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) tinh - anh tang luan khong chang ((nang than) OR (nang thanh)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (ho chieu)) tinh - anh tang luan khong chang ((nang than) or (nang thanh)) cau~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (ho chieu)) tinh - anh tang luan khong chang ((nang than) or (nang thanh)) cau*.