Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, thong thong, phong chong
hien tach » thien hach, chiet tach, vien bach
trinh cua » tinh cua, trinh luat, trinh quan
tong cong » trong cong, cong cong, dung cong
san than » sang than, san thanh, ban than
than ban » thanh ban, toan ban, than man

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien tach - hanh trinh cua ((thong cong) OR (tong cong)) san than ban~".
• Adding a wildcard symbol may retrieve word variants: hoc hien tach - hanh trinh cua ((thong cong) OR (tong cong)) san than ban*.