Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
cua ngan » cua ban, vu ngan, cua dan
nong dan » cong dan, nong san, nguong dan
dan van » dang van, doan van, dao van
chuc » thuc, chu, chua

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 - hanh trang ((cua ngan) or (chuc nang)) nong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh trang ((cua ngan) OR (chuc nang)) nong dan van ban*.