Perhaps you should try some spelling variations:
trinh nhiet » trinh thiet, trinh nghien, trinh viet
luan thanh » quan thanh, quang thanh, ban thanh
xuan thanh » quan thanh, quang thanh, ban thanh
cho nguoi » cua nguoi
vien duan » vien quan, vien luan, vien dai
tien duan » tien dua, tien huan, tien quang
nam hoi » nam khoa

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 nhiet ((luan thanh) or (xuan thanh)) cho nguoi viet nam hoi ((vien duan) OR (tien duan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh nhiet ((luan thanh) OR (xuan thanh)) cho nguoi viet nam hoi ((vien duan) OR (tien duan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "giao trinh nhiet ((luan thanh) or (xuan thanh)) cho nguoi viet nam hoi ((vien duan) OR (tien duan))".
• Adding a wildcard symbol may retrieve word variants: giao trinh nhiet ((luan thanh) or (xuan thanh)) cho nguoi viet nam hoi ((vien duan) OR (tien duan))*.