Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
mot chieu » doi chieu, ho chieu
hoc thieu » toc thieu, hoc hien
nang hang » nang sang, hang hang, cang thang
dung cong » dung trong
hang vat » hang va, dang vat, bang vat
vat dung » van dung, va dung, viet dung
cong tan » cong tac, cong san, cong thanh
tran ban » tranh ban, tran van, toan ban

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: ((((mot chieu) OR (hoc thieu))) OR (theo chieu)) sach - nang hang vat dung cong tan tran ban~.
• Adding a wildcard symbol may retrieve word variants: ((((mot chieu) or (hoc thieu))) or (theo chieu)) sach - nang hang vat dung cong tan tran ban*.