Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
thiet quy » thien quy, trien quy, hien quy
dien phan » dien thanh, bien phap, hien phap
quy manh » quy thanh, quy dinh, suc manh
manh cua » doanh cua, ban cua
dien dan » hien dai, vien dai, gian dan
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 quy manh cua nguoi viet ((ha hoc) or (nha hoc)) ((dien dan) or (dien phan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: giao trinh thiet quy manh cua nguoi viet ((ha hoc) OR (nha hoc)) ((dien dan) OR (dien phan)).
• Adding a wildcard symbol may retrieve word variants: giao trinh thiet quy manh cua nguoi viet ((ha hoc) or (nha hoc)) ((dien dan) or (dien phan))*.