Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo chieu » theo tieu, theo chu, thi chieu
trung qua » trung quan, trong qua, trung cua
dung cong » dung trong
ho chieu » hoc thieu, doi chieu, mot chieu
qua dung » quang dung, su dung, qua song
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tuan, trang tai
tran tan » tran tuan, tran van, tran thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (ho chieu)) sach - thanh trung qua dung cong tan ((tran tap) or (tran tan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) sach - thanh trung qua dung cong tan ((tran tap) OR (tran tan)).
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (ho chieu)) sach - thanh trung qua dung cong tan ((tran tap) or (tran tan))*.