Perhaps you should try some spelling variations:
chiet tach » chieu sach
thanh dung » thanh duong, thanh tung, thanh hung
dung thanh » duong thanh, dong thanh, dang thanh
cong cong » cong dong, trong cong, dung cong
cong vang » cong lang, cong quang, cong ngang
vang tuan » van tuan, vong tuan, quang tuan
tuan tap » toan tap, tuan tai, tuyen tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((chiet tach) or (chinh sach))) or (dieu hanh)) - thanh dung thanh cong cong vang tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((chiet tach) OR (chinh sach))) OR (dieu hanh)) - thanh dung thanh cong cong vang tuan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((((chiet tach) or (chinh sach))) or (dieu hanh)) - thanh dung thanh cong cong vang tuan tap*.