Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh dung » thanh duong, thanh tung, thanh hung
nang cong » nang song, bang cong, hang cong
dang cong » dung cong
ho chieu » theo chieu, hoc thieu, doi chieu
tran tap » toan tap, tran tuan, trang tai
tran tan » tran tuan, tran van, tran thanh

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 va ((nang cong) or (dang cong)) tan ((tran tap) or (tran tan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh dung va ((nang cong) OR (dang cong)) tan ((tran tap) OR (tran tan)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh dung va ((nang cong) or (dang cong)) tan ((tran tap) or (tran tan))*.