Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh trang » thanh trung, canh tranh, hanh trinh
vat dung » van dung, viet dung, mat duong
cong dan » cong san, cong tan, huong dan
va dung » van dung, va duong, va ung
dan van » dang van, doan van, dao van

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) or (chieu sang)) - hanh trang ((vat dung) OR (va dung)) cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu sang)) - hanh trang ((vat dung) OR (va dung)) cong dan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chieu sang)) - hanh trang ((vat dung) OR (va dung)) cong dan van ban".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu sang)) - hanh trang ((vat dung) OR (va dung)) cong dan van ban*.