Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
thien anh » thien danh, tien anh, thien thanh
cong doan » cong dan, dong doanh, cong san
cong hoan » cong hoa, dong hoa, cong san
mang cua » manh cua, dung cua, ban cua
cua dung » cua dang, cua dong, qua dung
phan cau » phan dau, phan cac, phan tu

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 ((hieu manh) OR (thien anh)) - cach mang cua dung ((cong doan) OR (cong hoan)) phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (thien anh)) - cach mang cua dung ((cong doan) OR (cong hoan)) phan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (thien anh)) - cach mang cua dung ((cong doan) OR (cong hoan)) phan cau*.