Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
nguoi vien » nguoi viet, nguoi tien, nguoi chien
vien khoa » von khoa, lieu khoa, van khoa
dien phan » dien thanh, bien phap, hien phap
vien than » vien thanh, dien than, vien nhan
luan san » luan hoan, luan phan, luan nang
khoa hoc » hoa 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 ((luan san) or (luan van)) cua nguoi vien khoa hoc ((dien phan) or (vien than))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh thiet ((luan san) OR (luan van)) cua nguoi vien khoa hoc ((dien phan) OR (vien than)).
• Adding a wildcard symbol may retrieve word variants: giao trinh thiet ((luan san) or (luan van)) cua nguoi vien khoa hoc ((dien phan) or (vien than))*.