Perhaps you should try some spelling variations:
trinh thiet » trinh thi
trinh viet » ninh viet, trinh vat
luat danh » luat doanh, luat dan, luat canh
danh cua » doanh cua, manh cua, dinh cua
dien han » dien phan, dien than, dien ban
dien dan » hien dai, vien dai, gian dan
viet va » viet van, viet ha, tiet va
va hoc » van 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 viet)) luat danh cua nguoi viet va hoc ((dien han) or (dien dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao ((trinh thiet) OR (trinh viet)) luat danh cua nguoi viet va hoc ((dien han) OR (dien dan)).
• Adding a wildcard symbol may retrieve word variants: giao ((trinh thiet) or (trinh viet)) luat danh cua nguoi viet va hoc ((dien han) or (dien dan))*.