Perhaps you should try some spelling variations:
thuong quang » thong quang, truong quang, phuong quang
cong thuong » hang thuong
chiet tach » chieu sach
manh tung » manh hung, thanh tung
chi tach » chiu trach, chi thanh, che tac
tung cua » trung cua, tuong cua, dung cua
tuan cau » quan cau, tuan cu, thuan cam
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 ((chi tach) OR (chiet tach)) - manh tung cua cong thuong quang ((tuan cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi tach) OR (chiet tach)) - manh tung cua cong thuong quang ((tuan cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi tach) OR (chiet tach)) - manh tung cua cong thuong quang ((tuan cau) or (toan cau))".
• Adding a wildcard symbol may retrieve word variants: doi ((chi tach) OR (chiet tach)) - manh tung cua cong thuong quang ((tuan cau) or (toan cau))*.