Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
dang huong » dang thuong, dong huong, dang cuong
tranh cua » doanh cua, manh cua
dang hung » dang quang, dang cong, van hung
manh hung » anh huong
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: hoc hien nhanh - canh tranh cua ((dang huong) or (((dang hung) OR (manh hung)))) dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - canh tranh cua ((dang huong) OR (((dang hung) OR (manh hung)))) dan than tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien nhanh - canh tranh cua ((dang huong) or (((dang hung) OR (manh hung)))) dan than tap*".