Perhaps you should try some spelling variations:
dong thuong » dong thong, dung thuong, dong huong
cong thuong » hang thuong
chieu xanh » chieu sach, chieu sang, chieu tinh
trung tuan » trung thanh, trung tam, truong thanh
doi chieu » doc hieu, doi chi, ho chieu
tran tuan » tran xuan, tran quang, tran thanh
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: doi chieu xanh - hanh ((trung tuan) OR (tran tuan)) ((dong thuong) or (cong thuong)) tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - hanh ((trung tuan) OR (tran tuan)) ((dong thuong) OR (cong thuong)) tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - hanh ((trung tuan) OR (tran tuan)) ((dong thuong) or (cong thuong)) tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh ((trung tuan) OR (tran tuan)) ((dong thuong) or (cong thuong)) tinh toan cau*.