Perhaps you should try some spelling variations:
dong thuong » dong thong, dung thuong, dong huong
cong thuong » hang thuong
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
trung tuan » trung thanh, trung tam, tran tuan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu xanh) OR (chieu sach)) - hanh trung tuan ((dong thuong) or (cong thuong)) tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sach)) - hanh trung tuan ((dong thuong) OR (cong thuong)) tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) OR (chieu sach)) - hanh trung tuan ((dong thuong) or (cong thuong)) tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) OR (chieu sach)) - hanh trung tuan ((dong thuong) or (cong thuong)) tinh toan cau*.