Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
chieu sach » chinh sach, chiet tach, chieu sang
hanh nhung » anh nhung, canh nhung, doanh nhung
nhung cao » nhung cau, nung cao, nhung ca
dong cong » duong cong, dung cong, dang cong
cao dong » cao dang, lao dong, cao cong
cong dan » cong san, cong tan, huong dan
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau

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: hoc ((thien hach) OR (chieu sach)) - hanh nhung cao dong cong dan ((phan cau) OR (phan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien hach) or (chieu sach)) - hanh nhung cao dong cong dan ((phan cau) OR (phan dau))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien hach) or (chieu sach)) - hanh nhung cao dong cong dan ((phan cau) OR (phan dau))*.