Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh tang » hanh trang, anh tang, hanh mang
cua nganh » chuc nganh, cua nhan, cua thanh
cua ngan » cua ban, vu ngan, cua dan
nong san » cong san, dong san, nong dan
san toan » van toan, dan toan, manh toan
toan ban » van ban

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 tang ((cua nganh) or (cua ngan)) nong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - hanh tang ((cua nganh) OR (cua ngan)) nong san toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chieu sang)) - hanh tang ((cua nganh) or (cua ngan)) nong san toan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chieu sang)) - hanh tang ((cua nganh) or (cua ngan)) nong san toan ban*.