Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chieu sang, chieu xanh
nhung cong » dung cong, thong cong, hang cong
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cau » toan cau, phan cau, than cap

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: hoc ((thieu sach) OR (((chieu sach) OR (chiet tach)))) - thanh trung cua nhung cong tan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) or (((chieu sach) OR (chiet tach)))) - thanh trung cua nhung cong tan than cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (((chieu sach) OR (chiet tach)))) - thanh trung cua nhung cong tan than cau*.