Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
thiet luan » thien luan, thi luan, thien quan
viet khoa » vien khoa, viec khoa, viet khoang
dien than » dien thanh, dien toan, dien phan
vien than » vien thanh, vien nhan, viet thanh
luan san » luan van, luan hoan, luan phan
khoa hoc » hoa hoc
dien han » dien phan, dien dan, dien ban
san cua » sang cua, ban cua, dan cua

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