Perhaps you should try some spelling variations:
bien tinh » bi tinh, yen tinh, diep tinh
doanh cua » doanh luan
hoc bien » hoc hien, hoc vien, hoa bien
manh cua » ban cua
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
chan tap » han tap, phan tap, chan ta

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 - hanh ((manh cua) or (doanh cua)) nhung ((cong dan) or (cong san)) chan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc bien tinh - hanh ((manh cua) OR (doanh cua)) nhung ((cong dan) OR (cong san)) chan tap.
• Adding a wildcard symbol may retrieve word variants: hoc bien tinh - hanh ((manh cua) or (doanh cua)) nhung ((cong dan) or (cong san)) chan tap*.