Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
vien nganh » vien thanh
trien nhan » trien nha, tri nhan, trien khai
thiet qua » thien quan, hieu qua, thien quy
viet nhat » biet nhat, tiet nhat, viet nam
vien nhan » vien than, vien thanh, hien nhanh
qua dinh » qua kinh, quy dinh, qua danh
dinh cua » dinh cuu, sinh cua, dinh cu
nhat hoc » nha hoc, chat hoc, nhan 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 cua nguoi viet nhat hoc ((((vien nhan) OR (vien nganh))) or (trien nhan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh thiet qua dinh cua nguoi viet nhat hoc ((((vien nhan) OR (vien nganh))) OR (trien nhan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "giao trinh thiet qua dinh cua nguoi viet nhat hoc ((((vien nhan) OR (vien nganh))) or (trien nhan))".
• Adding a wildcard symbol may retrieve word variants: giao trinh thiet qua dinh cua nguoi viet nhat hoc ((((vien nhan) OR (vien nganh))) or (trien nhan))*.