Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
trien nhan » trien nha, tri nhan, trien khai
hoc trien » hoc tren, hoc tien, hoc truyen
qua dinh » qua kinh, quy dinh, qua ninh
qua danh » qua dan, luan danh, luat danh
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) or (qua danh)) cua nguoi viet ha hoc trien nhan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh thiet ((qua dinh) OR (qua danh)) cua nguoi viet ha hoc trien nhan.
• Adding a wildcard symbol may retrieve word variants: giao trinh thiet ((qua dinh) or (qua danh)) cua nguoi viet ha hoc trien nhan*.