Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
chieu sach » chinh sach, chiet tach, chieu sang
hanh nang » anh nang, ganh nang, hanh mang
dang cong » dung cong
cong dan » cong san, cong tan, huong dan
phan cac » nhan cach, phan lap, phan van
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien hach) or (chieu sach)) - hanh nang cao dang cong dan ((phan cac) OR (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (chieu sach)) - hanh nang cao dang cong dan ((phan cac) OR (phan dau))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien hach) or (chieu sach)) - hanh nang cao dang cong dan ((phan cac) OR (phan dau))*".