Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
trinh dieu » trinh dien, tinh dieu, trinh dinh
luan danh » luan thanh, luan van, luan nang
tien duan » tien dua, tien huan, tien quang
danh cua » doanh cua, manh cua, dinh cua
hoc tien » hoc tieng, hoc hien, hoc vien
viet n1 » viet 1, viet nm, viet nam
n1 hoc » n1 doc, n3 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 thiet) or (trinh dieu)) luan danh cua nguoi viet n1 hoc tien duan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao ((trinh thiet) OR (trinh dieu)) luan danh cua nguoi viet n1 hoc tien duan.
• Adding a wildcard symbol may retrieve word variants: giao ((trinh thiet) or (trinh dieu)) luan danh cua nguoi viet n1 hoc tien duan*.