Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
dung dang » dung dan, dung dong, dung danh
hoan thai » hoang thai, hoa thai, hoan thanh
cong dan » cong san, cong tan, huong dan
dan dung » van dung, tin dung, ap dung
dang van » hoang van, hang va
van hoan » van hoang, van hoa, van toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (toc thieu)) sach - thanh cong dan dung dang van hoan thai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (toc thieu)) sach - thanh cong dan dung dang van hoan thai*".