Perhaps you should try some spelling variations:
thanh trung » thanh tung
chong cong » cong cong, thong cong, cuong cong
bien tinh » bi tinh, yen tinh, ban tinh
trung cua » truong cua, trung tuan, trung cap
cua chong » cua cong, cua chung, cua khong
hach toan » thanh toan, manh toan
tac toan » tap toan, tam toan, tich toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((bien tinh) or (diep tinh)) - thanh trung cua chong cong ((tac toan) or (hach toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((bien tinh) OR (diep tinh)) - thanh trung cua chong cong ((tac toan) OR (hach toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((bien tinh) or (diep tinh)) - thanh trung cua chong cong ((tac toan) or (hach toan)) cau*.