Perhaps you should try some spelling variations:
thanh trung » thanh tung
chat quang » chat luong, pham quang
cua quang » cua quan, qua quang, luat quang
cuong tac » cong tac, tuong tac, cuong cac
ho trieu » mot trieu, 25 trieu, 30 trieu
tac toan » tap toan, tam toan, hach toan
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 trieu tinh - thanh trung ((cua quang) OR (chat quang)) cuong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho trieu tinh - thanh trung ((cua quang) OR (chat quang)) cuong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ho trieu tinh - thanh trung ((cua quang) OR (chat quang)) cuong tac toan cau*.