Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh san » thanh san, khach san, thanh son
cong van » cong vang, song van, cong tan
cong san » cong tac
tan cao » toan cao, tao cao, tay cao
san va » san van, ban va, dan va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sach) OR (chieu sang)) - hanh san va nhung ((cong van) or (cong san)) tan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chieu sang)) - hanh san va nhung ((cong van) OR (cong san)) tan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) OR (chieu sang)) - hanh san va nhung ((cong van) or (cong san)) tan cao".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) OR (chieu sang)) - hanh san va nhung ((cong van) or (cong san)) tan cao*.