Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh thanh » nhanh thanh, thanh thanh, khanh thanh
doi chieu » doc hieu, doi chi, ho chieu
ha truong » nha truong, ha trung, sa truong
xa truong » cac truong
cong tac » cong ty
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: doi chieu sach - hanh thanh ((ha truong) OR (xa truong)) ((huong dan) OR (cong tac)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh thanh ((ha truong) OR (xa truong)) ((huong dan) or (cong tac)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh thanh ((ha truong) OR (xa truong)) ((huong dan) or (cong tac)) toan cao*.