Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
trinh dieu » trinh dien, tinh dieu, trinh dinh
tien duan » tien dua, tien huan, tien quang
hoc tien » hoc tieng, hoc hien, hoc vien
van cua » vang cua, ban cua, dan cua
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 van 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 van cua nguoi viet n1 hoc tien duan.
• Adding a wildcard symbol may retrieve word variants: giao ((trinh thiet) or (trinh dieu)) luan van cua nguoi viet n1 hoc tien duan*.