Perhaps you should try some spelling variations:
trinh hieu » trinh dieu, trinh thiet, trinh nhiet
cho nguoi » cua nguoi
hien huan » hien thuan, hien quan, thien quan
tien huan » tien duan, tieu chuan, hien thuan
qua danh » luan danh, luat danh, quoc danh
viet nma » viet nm, viet nami, viet nhat
qua dan » qua ban, cua dan, mua dan
nma hoc » nha hoc, nhan 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) OR (qua dan)) cho nguoi viet nma hoc ((hien huan) or (tien huan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh hieu ((qua danh) OR (qua dan)) cho nguoi viet nma hoc ((hien huan) OR (tien huan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "giao trinh hieu ((qua danh) OR (qua dan)) cho nguoi viet nma hoc ((hien huan) or (tien huan))".
• Adding a wildcard symbol may retrieve word variants: giao trinh hieu ((qua danh) OR (qua dan)) cho nguoi viet nma hoc ((hien huan) or (tien huan))*.