Perhaps you should try some spelling variations:
chiet tach » chieu sach
thong cong » trong cong, tong cong, thong thong
hanh mang » nhanh mang, hanh trang, nhanh lang
va thong » va thuong, va phuong, he thong
cong dan » cong san, cong tan, huong dan
mang va » mang vua, hang va, bang va
chai tu » cai tu, choi tu, chay tu
chon tu » con tu, cho tu, choi tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chinh sach) or (chiet tach)) - hanh mang va thong cong dan ((chai tu) or (chon tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chinh sach) OR (chiet tach)) - hanh mang va thong cong dan ((chai tu) OR (chon tu)).
• Adding a wildcard symbol may retrieve word variants: theo ((chinh sach) or (chiet tach)) - hanh mang va thong cong dan ((chai tu) or (chon tu))*.