Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh dung » thanh dung, anh dung, hanh dong
luan dong » quan dong, luan nong, luan luong
luan cong » luat cong, luong cong, luan chung
tra cau » tra sau, tra cuu, toan cau
ta cau » tao cau, va cau, da cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - hanh dung ((luan dong) or (luan cong)) cong thanh ((tra cau) OR (ta cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh dung ((luan dong) OR (luan cong)) cong thanh ((tra cau) OR (ta cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh dung ((luan dong) or (luan cong)) cong thanh ((tra cau) OR (ta cau))".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh dung ((luan dong) or (luan cong)) cong thanh ((tra cau) OR (ta cau))*.