Perhaps you should try some spelling variations:
trang luan » tang luan, trang tuan, truong luan
tranh luan » trinh luan, trinh luat, doanh luan
phung cong » nhung cong, nhung chong, dung cong
phong cong » phong chong, thong cong, chong cong
30 trieu » 25 trieu
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

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 ((trang luan) OR (tranh luan)) ((phung cong) or (phong cong)) dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: 30 trieu tinh - hanh ((trang luan) OR (tranh luan)) ((phung cong) OR (phong cong)) dan than tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "30 trieu tinh - hanh ((trang luan) OR (tranh luan)) ((phung cong) or (phong cong)) dan than tap".
• Adding a wildcard symbol may retrieve word variants: 30 trieu tinh - hanh ((trang luan) OR (tranh luan)) ((phung cong) or (phong cong)) dan than tap*.