Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
thien anh » thien danh, tien anh, thien thanh
hanh nhan » thanh nhan, danh nhan, anh nhan
thanh cua » tranh cua, than cua, hanh cua
cong van » cong vang, song van, cong tan
cong san » cong tac
nhan va » nhan tai, nhan dan, nhan tao
va dung » van dung, va duong, vat dung

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)) - hanh nhan va dung ((cong van) OR (cong san)) thanh cua~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (thien anh)) - hanh nhan va dung ((cong van) OR (cong san)) thanh cua~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (thien anh)) - hanh nhan va dung ((cong van) OR (cong san)) thanh cua*.