Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
thiet luan » thien luan, thi luan, thien quan
nguoi vien » nguoi viet, nguoi tien, nguoi chien
vien thanh » viet thanh, tien thanh, dien thanh
vien khoa » von khoa, lieu khoa, van khoa
danh cua » doanh cua, manh cua, dan cua
dinh cua » dinh cuu, sinh cua, dinh cu
khoa hoc » hoa hoc
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 ((danh cua) OR (dinh cua)) nguoi vien khoa hoc ((dien dan) or (vien thanh))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh thiet luan ((danh cua) OR (dinh cua)) nguoi vien khoa hoc ((dien dan) OR (vien thanh)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "giao trinh thiet luan ((danh cua) OR (dinh cua)) nguoi vien khoa hoc ((dien dan) or (vien thanh))".
• Adding a wildcard symbol may retrieve word variants: giao trinh thiet luan ((danh cua) OR (dinh cua)) nguoi vien khoa hoc ((dien dan) or (vien thanh))*.