Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
vien nganh » vien thanh
thiet qua » thien quan, hieu qua, thien quy
vien nhan » vien than, trien nhan, vien thanh
qua dinh » qua kinh, quy dinh, qua danh
cu nguoi » cua nguoi, chu nguoi, ca nguoi
dinh cu » dinh cuu, dinh chuc, dinh chau
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 qua dinh cu nguoi viet ha hoc ((vien nhan) or (vien nganh))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh thiet qua dinh cu nguoi viet ha hoc ((vien nhan) OR (vien nganh)).
• Adding a wildcard symbol may retrieve word variants: giao trinh thiet qua dinh cu nguoi viet ha hoc ((vien nhan) or (vien nganh))*.