Perhaps you should try some spelling variations:
nhiet tach » chiet tach
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
hoc nhiet » hoc thiet, hoc nghien, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
cua thong » cua thuong, cua khong, cua tong
san thanh » ban thanh, van thanh, son thanh
san than » sang than, ban than, van than

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 nhiet tach - hanh trinh cua thong cong ((san than) OR (san thanh)) ban~".
• Adding a wildcard symbol may retrieve word variants: hoc nhiet tach - hanh trinh cua thong cong ((san than) OR (san thanh)) ban*.