Perhaps you should try some spelling variations:
choi trong » hoi trong, hoc trong, hoa trong
hoc chieu » hoc thieu, hoc hien, hoc dieu
hanh dung » thanh dung, anh dung, hanh dong
dung choi » dung cho, dung chi, dung thoi
cong danh » cuong danh, cong dan, cong thanh
ho chieu » theo chieu, hoc thieu, doi chieu

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