Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, nhung don
doi chieu » doc hieu, doi chi, ho chieu
hang cong » dang cong, hang nong, bang cong
tinh cua » trinh cua, tinh chat, tranh cua
sinh cua » manh cua, dinh cuu, sinh va
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 - nhanh ((tinh cua) OR (sinh cua)) ((nhung cong) OR (hang cong)) dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - nhanh ((tinh cua) or (sinh cua)) ((nhung cong) OR (hang cong)) dan toan cao~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - nhanh ((tinh cua) or (sinh cua)) ((nhung cong) OR (hang cong)) dan toan cao*.