Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
thiet luan » thien luan, thi luan, thien quan
luan manh » luan danh, luan anh, luan mach
vien than » vien thanh, vien nhan, viet thanh
dien than » dien thanh, dien toan, dien phan
manh cua » doanh cua, ban cua
dien han » dien phan, dien dan, dien ban
viet ha » viet nam
ha hoc » hoa hoc, nha hoc, va 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 manh cua nguoi viet ha hoc ((dien han) or (((vien than) OR (dien than))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh thiet luan manh cua nguoi viet ha hoc ((dien han) OR (((vien than) OR (dien than)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "giao trinh thiet luan manh cua nguoi viet ha hoc ((dien han) or (((vien than) OR (dien than))))".
• Adding a wildcard symbol may retrieve word variants: giao trinh thiet luan manh cua nguoi viet ha hoc ((dien han) or (((vien than) OR (dien than))))*.