Perhaps you should try some spelling variations:
dong thuong » cong thuong, dung thuong, dong huong
chieu xanh » chieu sach, chieu sang, chieu tinh
trung tuan » trung thanh, trung tam, tran tuan
dong thong » thong thong, nong thon, dong thanh
ho chieu » theo chieu, hoc thieu, doi chieu
tang cua » mang cua, hang cua, tang luan
doan van » doan va, hoang van, luan van

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 xanh - hanh ((trung tuan) OR (tang cua)) ((dong thuong) OR (dong thong)) doan van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - hanh ((trung tuan) or (tang cua)) ((dong thuong) OR (dong thong)) doan van ban~".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh ((trung tuan) or (tang cua)) ((dong thuong) OR (dong thong)) doan van ban*.