Perhaps you should try some spelling variations:
bien tinh » bi tinh, yen tinh, diep tinh
tranh cua » doanh cua, manh cua
bang cong » dang cong, bang song, dung cong
hang cong » dang cong, hang nong, thanh cong
hoc bien » hoc hien, hoc vien, hoa bien
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc bien tinh - canh tranh cua ((bang cong) OR (hang cong)) dan than ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc bien tinh - canh tranh cua ((bang cong) OR (hang cong)) dan than ban".
• Adding a wildcard symbol may retrieve word variants: hoc bien tinh - canh tranh cua ((bang cong) OR (hang cong)) dan than ban*.