Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
cong thanh » dong thanh, cong trinh, cong tan
nhan dang » nhan dan, phan dang, tran dang
dung cong » dung trong
dang cua » dung cua, dong cua, mang cua
cua dung » cua dang, cua dong, qua dung
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (cuu tinh)) - nhan dang cua dung cong thanh ((toan tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (cuu tinh)) - nhan dang cua dung cong thanh ((toan tai) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (cuu tinh)) - nhan dang cua dung cong thanh ((toan tai) or (toan cao))*.