Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
khong tang » khong cang, khong thanh, khong trong
tranh hua » tranh chua, tranh cua, tranh ha
hua khong » hoa khong, cua khong, hoac khong
ho chieu » hoc thieu, doi chieu, mot chieu
tang dan » tang van, tung dan, tang luan
toan cao » toan tap
toan ban » van ban

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: ((ho chieu) OR (theo chieu)) tach - canh tranh hua khong tang dan ((toan cao) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chieu)) tach - canh tranh hua khong tang dan ((toan cao) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (theo chieu)) tach - canh tranh hua khong tang dan ((toan cao) or (toan ban))*.