Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thieu hach » thien hach, chieu sach, hieu cach
canh doanh » hanh doanh, chinh doanh, doanh doanh
doanh cua » doanh luan
cua nhung » va nhung
cong anh » cong danh, hong anh, cong thanh
dong anh » hong anh, dong thanh, hoang anh
tuan tap » toan tap, tuan tai, tuyen tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu hach) or (thien thanh)) - canh doanh cua nhung ((cong anh) OR (dong anh)) tuan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu hach) OR (thien thanh)) - canh doanh cua nhung ((cong anh) OR (dong anh)) tuan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu hach) or (thien thanh)) - canh doanh cua nhung ((cong anh) OR (dong anh)) tuan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu hach) or (thien thanh)) - canh doanh cua nhung ((cong anh) OR (dong anh)) tuan tap*.