Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
thiet luan » thien luan, thi luan, thien quan
tien thanh » tien thinh, tran thanh, den thanh
luan nang » luan van, van nang, luan san
viet khoa » vien khoa, viec khoa, viet khoang
nang cua » mang cua, hang cua, nang dua
khoa hoc » hoa hoc
dien han » dien phan, dien than, dien ban
dien dan » hien dai, vien dai, gian dan

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 luan nang cua nguoi viet khoa hoc ((((dien han) or (dien dan))) or (tien thanh))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh thiet luan nang cua nguoi viet khoa hoc ((((dien han) OR (dien dan))) OR (tien thanh)).
• Adding a wildcard symbol may retrieve word variants: giao trinh thiet luan nang cua nguoi viet khoa hoc ((((dien han) or (dien dan))) or (tien thanh))*.