Perhaps you should try some spelling variations:
trinh hieu » trinh dieu, trinh thiet, trinh nhiet
luan danh » luan thanh, luan van, luan nang
cho nguoi » cua nguoi
hien huan » hien thuan, hien quan, tien huan
qua danh » qua dan, luat danh, quoc danh
nma hoc » nhan hoc
nha hoc » nha thuoc, khoa hoc, nha nuoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: giao trinh hieu ((qua danh) or (luan danh)) cho nguoi viet ((nma hoc) OR (nha hoc)) hien huan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh hieu ((qua danh) OR (luan danh)) cho nguoi viet ((nma hoc) OR (nha hoc)) hien huan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "giao trinh hieu ((qua danh) or (luan danh)) cho nguoi viet ((nma hoc) OR (nha hoc)) hien huan".
• Adding a wildcard symbol may retrieve word variants: giao trinh hieu ((qua danh) or (luan danh)) cho nguoi viet ((nma hoc) OR (nha hoc)) hien huan*.