Perhaps you should try some spelling variations:
trinh dieu » trinh dien, tinh dieu, trinh dinh
cho nguoi » cua nguoi
hien huan » hien thuan, hien quan, tien huan
dieu qua » dieu quan, hieu qua, dieu cua
qua danh » qua dan, luan danh, luat danh
nhan hoc » nha hoc, nhan hoa, than hoc
nma hoc » nha hoc

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 dieu qua danh cho nguoi viet ((nma hoc) or (nhan hoc)) hien huan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh dieu qua danh cho nguoi viet ((nma hoc) OR (nhan hoc)) hien huan.
• Adding a wildcard symbol may retrieve word variants: giao trinh dieu qua danh cho nguoi viet ((nma hoc) or (nhan hoc)) hien huan*.