Perhaps you should try some spelling variations:
chiet tach » chieu sach
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tang » hanh trang, anh tang, hanh mang
cong cong » cong dong, trong cong, dung cong
tang cua » mang cua, hang cua, tang luan
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 ((((chiet tach) or (chinh sach))) or (hieu lang)) - hanh tang cua cong cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((chiet tach) OR (chinh sach))) OR (hieu lang)) - hanh tang cua cong cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: theo ((((chiet tach) or (chinh sach))) or (hieu lang)) - hanh tang cua cong cong dan toan cao*.