Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
hanh dung » thanh dung, anh dung, hanh dong
cua khong » hua khong, cua phuong, cua thuong
ho chieu » theo chieu, doi chieu, mot chieu
cong van » cong vang, cong san, song van
van va » van vat, van van, ban va
va ban » van ban, va bai, va bao

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 (hoc thieu)) xanh - hanh dung ((suat thong) OR (cua khong)) cong van va ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) xanh - hanh dung ((suat thong) or (cua khong)) cong van va ban~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - hanh dung ((suat thong) or (cua khong)) cong van va ban*.