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 hoc » nha thuoc, khoa hoc, nha nuoc
ha hoc » hoa hoc, va hoc, ha 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 hoc) OR (nha hoc)) tieng nganh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "giao trinh thiet qua dinh cua nguoi viet ((ha hoc) OR (nha hoc)) tieng nganh".
• Adding a wildcard symbol may retrieve word variants: giao trinh thiet qua dinh cua nguoi viet ((ha hoc) OR (nha hoc)) tieng nganh*.