Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
anh truong » manh truong, anh thuong, anh trong
truong cao » truong dai
dung cong » dung trong
than cap » khan cap, thanh lap, thanh cac
khan ap » khan cap, han ap, khan dam

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 truong cao ((dang cong) OR (dung cong)) dan ((than cap) OR (khan ap))~.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - anh truong cao ((dang cong) or (dung cong)) dan ((than cap) or (khan ap))*.