Perhaps you should try some spelling variations:
hoc thieu » hoc hien
manh dung » manh hung, manh tung, anh dung
cua nhung » va nhung
dung cua » dung luan, dung cho
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
than cau » toan cau, phan cau, than cap

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 thieu) OR (toc thieu)) xanh - manh dung cua nhung ((cong dan) OR (cong tan)) than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (toc thieu)) xanh - manh dung cua nhung ((cong dan) OR (cong tan)) than cau~".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (toc thieu)) xanh - manh dung cua nhung ((cong dan) OR (cong tan)) than cau*.