Perhaps you should try some spelling variations:
tieng nganh » tieng anh, trong nganh, vien nganh
trinh thiet » trinh viet, trinh thi
thiet qua » thien quan, hieu qua, thien quy
qua dinh » qua kinh, quy dinh, qua danh
dinh cua » dinh cuu, sinh cua, dinh cu
nha hoa » nha khoa, nhan hoa, nhat hoa
ha hoa » hai hoa, kha hoa, ma hoa

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