Perhaps you should try some spelling variations:
trinh hieu » trinh dieu, trinh thiet, trinh nhiet
cho nguoi » cua nguoi
viet nhan » viet phan, vien nhan, viet han
hien huan » hien thuan, hien quan, thien quan
tien huan » tien duan, tieu chuan, hien thuan
qua danh » qua dan, luan danh, luat danh
nhan hoc » nha hoc, nhan hoa, than 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 hieu qua danh cho nguoi viet nhan hoc ((hien huan) or (tien huan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh hieu qua danh cho nguoi viet nhan hoc ((hien huan) OR (tien huan)).
• Adding a wildcard symbol may retrieve word variants: giao trinh hieu qua danh cho nguoi viet nhan hoc ((hien huan) or (tien huan))*.