Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
dung cong » dung trong
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
tang va » tang van, thang va, tang vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (chieu sang)) - anh ((tang va) or (trang va)) dung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu sang)) - anh ((tang va) OR (trang va)) dung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu sang)) - anh ((tang va) or (trang va)) dung cong dan toan cao*.