Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tong » thanh tung, thanh long, thanh hong
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, mot chieu
tap dung » ap dung, tac dung, tan dung
cong san » cong tac
pham dau » phan dau, pham dac, phap dau
pham dat » pham dac, pham nhat, pham dang

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: ho chieu sach - ((thanh tong) OR (thanh cong)) tap dung cong san ((pham dau) OR (pham dat))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((thanh tong) or (thanh cong)) tap dung cong san ((pham dau) OR (pham dat))~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((thanh tong) or (thanh cong)) tap dung cong san ((pham dau) OR (pham dat))*.