Perhaps you should try some spelling variations:
dong thuong » cong thuong, dung thuong, dong huong
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
dong thong » thong thong, nong thon, dong thanh
mach toan » manh toan, hach toan, mach tuan
toan tap » toan ban

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 tam ((dong thuong) OR (dong thong)) mach toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sach)) - hanh trung tam ((dong thuong) OR (dong thong)) mach toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu sach)) - hanh trung tam ((dong thuong) OR (dong thong)) mach toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sach)) - hanh trung tam ((dong thuong) OR (dong thong)) mach toan tap*.