Perhaps you should try some spelling variations:
thanh phuong » thanh huong, thanh chuong, khanh phong
hieu manh » chieu xanh, hieu nganh, hien hanh
duc phung » duc hung, duc thang, duc dung
duc trung » dac trung, dung trung, do trung
cong san » cong tac
san tran » tan tran, ban tran, dang tran
tran cau » tran chau, toan cau, ran 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 ((hieu manh) OR (dieu hanh)) - thanh phuong ((duc phung) or (duc trung)) cong san tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (dieu hanh)) - thanh phuong ((duc phung) OR (duc trung)) cong san tran cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) OR (dieu hanh)) - thanh phuong ((duc phung) or (duc trung)) cong san tran cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) OR (dieu hanh)) - thanh phuong ((duc phung) or (duc trung)) cong san tran cau*.