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
sinh cua » manh cua, dinh cuu, sinh va
viet nha » viet nhat, viet ha, viec nha
hoc vien » hoc hien, hoc viet, hoc tieng
dinh cu » dinh cuu, dinh chuc, dinh chau
nha hoc » nha thuoc, khoa hoc, nha nuoc

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 ((sinh cua) or (dinh cu)) nguoi viet nha hoc vien nganh~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh thiet qua ((sinh cua) OR (dinh cu)) nguoi viet nha hoc vien nganh.
• Adding a wildcard symbol may retrieve word variants: giao trinh thiet qua ((sinh cua) or (dinh cu)) nguoi viet nha hoc vien nganh*.