Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
doi chiet » doi chieu, doi chi, doi viet
cong dan » cong san, cong tan, huong dan
dan luan » doanh luan, dung luan, tang luan
luan cao » juan cao, luan bao, quang cao
va dang » van dang, va nang, da dang
va lang » va nang, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chiet tach - hanh trinh ((va dang) OR (va lang)) cong dan luan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chiet tach - hanh trinh ((va dang) OR (va lang)) cong dan luan cao*".