Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, lanh tranh
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
cong dan » cong san, cong tan, huong dan
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: hoc ((chieu sach) or (lieu tinh)) - ((hanh tranh) or (hanh trang)) va nhung cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (lieu tinh)) - ((hanh tranh) OR (hanh trang)) va nhung cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (lieu tinh)) - ((hanh tranh) or (hanh trang)) va nhung cong dan van ban*.