Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
chau tinh » cuu tinh, ha tinh, cua tinh
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
ban toan » bai toan, van toan, bao toan
ban than » ban thanh, van thanh, ban hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((dieu hanh) or (chau tinh)) - thanh trung cua nhung cong ((ban toan) OR (ban than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((dieu hanh) OR (chau tinh)) - thanh trung cua nhung cong ((ban toan) OR (ban than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((dieu hanh) or (chau tinh)) - thanh trung cua nhung cong ((ban toan) OR (ban than)) cau".
• Adding a wildcard symbol may retrieve word variants: ho ((dieu hanh) or (chau tinh)) - thanh trung cua nhung cong ((ban toan) OR (ban than)) cau*.