Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, truong thanh
tieu sang » chieu sang, tieu dung, tiem nang
hanh tang » hanh trang, anh tang, hanh mang
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong ty
toan ban » van ban
tang va » trang va, tang van, thang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sang - hanh tang va nhung ((cong dan) or (((cong tan) or (cong thanh)))) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - hanh tang va nhung ((cong dan) OR (((cong tan) OR (cong thanh)))) toan ban.
• Adding a wildcard symbol may retrieve word variants: theo tieu sang - hanh tang va nhung ((cong dan) or (((cong tan) or (cong thanh)))) toan ban*.