Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
nhung cong » dung cong, thong cong, hang cong
chu xanh » chu manh, chieu xanh, chua xang
anh tang » anh bang, anh dang, anh nang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
tang va » trang va, tang van, thang va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (((chieu sach) OR (chiet tach)))) - anh tang va nhung cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (((chieu sach) OR (chiet tach)))) - anh tang va nhung cong dan toan cao~".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (((chieu sach) OR (chiet tach)))) - anh tang va nhung cong dan toan cao*.