Perhaps you should try some spelling variations:
tuong quan » truong quan, thong quan, luong quan
trong quan » thong quan, tong quan, thong quang
tuong qua » duong qua, thong qua, trong qua
quan toan » quang toan, quan doan, xuan toan
ho chiet » ho chieu, hoc thiet, hoa thiet
ho thiet » hoc thiet, hoa thiet, so thiet
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 chiet) or (ho thiet)) tach - thanh ((tuong qua) OR (tuong quan)) dung trong quan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (ho thiet)) tach - thanh ((tuong qua) OR (tuong quan)) dung trong quan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) or (ho thiet)) tach - thanh ((tuong qua) OR (tuong quan)) dung trong quan toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chiet) or (ho thiet)) tach - thanh ((tuong qua) OR (tuong quan)) dung trong quan toan cau*.