Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
manh trung » manh tung, thanh trung, manh hung
trung tuan » trung thanh, trung tam, tran tuan
tuan hang » tuan hoang, tuan bang, tuan dang
hang cong » dang cong, hang nong, bang cong
van tan » van tuan, van ban, van tai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chiet tach) OR (chieu sach)) - manh trung tuan hang cong ((tinh toan) OR (van tan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chiet tach) OR (chieu sach)) - manh trung tuan hang cong ((tinh toan) or (van tan)) cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((chiet tach) OR (chieu sach)) - manh trung tuan hang cong ((tinh toan) or (van tan)) cau*.