Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
thong cong » trong cong, tong cong, thong thong
nhung don » nhung van, nhung bo
25 trieu » 30 trieu
than tap » toan tap, phan tap, than cap
han tap » han tai, toan tap, nhan tai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: 25 trieu tinh - hanh trinh quan ((nhung don) OR (thong cong)) dan ((than tap) OR (han tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "25 trieu tinh - hanh trinh quan ((nhung don) or (thong cong)) dan ((than tap) OR (han tap))~".
• Adding a wildcard symbol may retrieve word variants: 25 trieu tinh - hanh trinh quan ((nhung don) or (thong cong)) dan ((than tap) OR (han tap))*.