Perhaps you should try some spelling variations:
phong cong » phong chong, thong cong, chong cong
hanh tang » hanh trang, anh tang, hanh mang
van phong » van dong, hai phong
30 trieu » 25 trieu
tang van » dang van, hoang van, trong van
hai thap » khai thac, hai thanh, nhap thap
hai tap » bai tap, han tap, hai tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: 30 trieu tinh - hanh tang van phong cong ((hai tap) OR (hai thap)) cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "30 trieu tinh - hanh tang van phong cong ((hai tap) OR (hai thap)) cac".
• Adding a wildcard symbol may retrieve word variants: 30 trieu tinh - hanh tang van phong cong ((hai tap) OR (hai thap)) cac*.