Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
chieu sach » chinh sach, chiet tach, chieu sang
dong cong » duong cong, dung cong, dang cong
hanh han » hanh nhan, hanh phan, hanh san
cau dong » cau duong, cau cong, cao dong
cong van » cong vang, cong san, song van
chat cau » chat cao, chat va, chat ban
chat cam » chat cao, thuat cam, chat va
han cau » hang cau, phan cau, van cau

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 han cau dong cong van ((chat cau) OR (chat cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (chieu sach)) - hanh han cau dong cong van ((chat cau) OR (chat cam))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien hach) or (chieu sach)) - hanh han cau dong cong van ((chat cau) OR (chat cam))*".