Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tinh trang » minh trang, tinh quang, tinh toan
nhung tung » nhung tuong, nhung dung, nhung vung
tung dan » dung dan, huong dan, trung dai
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: theo chieu sach - ((tinh trang) or (hanh chinh)) va nhung tung dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((tinh trang) OR (hanh chinh)) va nhung tung dan van ban*.