Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh dung » thanh duong, thanh hung, thanh dong
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hanh dung » anh dung, hanh dong, manh dung
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tan, tran tuan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - ((((thanh dung) OR (hanh dung))) or (thanh tung)) va nhung cong tan tran tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((((thanh dung) OR (hanh dung))) OR (thanh tung)) va nhung cong tan tran tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((((thanh dung) OR (hanh dung))) or (thanh tung)) va nhung cong tan tran tap".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((((thanh dung) OR (hanh dung))) or (thanh tung)) va nhung cong tan tran tap*.