Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thuat dung » thuat hung, thuat ung, thuat xung
hoc chieu » hoc thieu, ho chieu, hoc hien
dung cong » dung trong
cong lang » cong vang, cong luong, cong quang
anh nang » ganh nang, anh bang, anh dang
lang van » dang van, tang van, hoang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - ((anh nang) or (sach dung)) thuat dung cong lang van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - ((anh nang) OR (sach dung)) thuat dung cong lang van ban*.