Perhaps you should try some spelling variations:
hang hang » nang hang, cang thang, hung thang
tong cong » trong cong, cong cong, dung cong
ho trieu » mot trieu, 25 trieu, 30 trieu
hanh han » hanh nhan, hanh phan, hanh san
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap
va tong » va thong, va tuong, va trong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho trieu tinh - ((hang hang) or (hanh han)) va tong cong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho trieu tinh - ((hang hang) OR (hanh han)) va tong cong dan than tap.
• Adding a wildcard symbol may retrieve word variants: ho trieu tinh - ((hang hang) or (hanh han)) va tong cong dan than tap*.