Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
tanh dung » thanh dung, tinh dung, manh dung
cua nhung » va nhung
anh dung » anh dong, anh huong, sach dung
cong van » cong vang, cong san, song van
than cao » thai cao, than cap, than sao
toan cao » toan ban, toan tap

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: theo chieu sach - ((anh dung) OR (tanh dung)) cua nhung cong van ((than cao) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((anh dung) or (tanh dung)) cua nhung cong van ((than cao) OR (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((anh dung) or (tanh dung)) cua nhung cong van ((than cao) OR (toan cao))*.