Perhaps you should try some spelling variations:
thanh trung » thanh tung
khong cong » thong cong, khong cang, chong cong
trung cua » truong cua, trung tuan, trung cap
cua khong » hua khong, cua phuong, cua thuong
yen tinh » tuyen tinh
cong tac » cong ty
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: hoc ((yen tinh) or (diep tinh)) - thanh trung cua khong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((yen tinh) OR (diep tinh)) - thanh trung cua khong cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((yen tinh) or (diep tinh)) - thanh trung cua khong cong tac toan cau*.