Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
dung cong » dung trong
lang cua » mang cua, hang cua, tang cua
long cua » luong cua, cong cua, dong cua
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.

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