Perhaps you should try some spelling variations:
dong thong » nong thon, dong thanh, thong thuong
tieu xanh » tieu danh, chieu xanh, dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
thanh tap » thanh lap, thanh tai, thanh tam
thanh tay » thanh tai, thanh toan, thanh thuy
tang cua » mang cua, hang cua, tang luan

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: theo tieu xanh - hanh tang cua ((dong thong) OR (thong thong)) quan ((thanh tap) OR (thanh tay))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - hanh tang cua ((dong thong) or (thong thong)) quan ((thanh tap) OR (thanh tay))~".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - hanh tang cua ((dong thong) or (thong thong)) quan ((thanh tap) OR (thanh tay))*.