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, minh trang
hanh trinh » canh tranh, hanh chinh
va trong » va truong, va thong, va tuong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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