Perhaps you should try some spelling variations:
chieu tinh » lieu tinh, chau tinh, kieu tinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
tranh cua » doanh cua, manh cua
dang hung » dang quang, manh hung, dang cong
cua dang » cua cong, cua ban
hung tap » nhung tap, hang tap, hung tan
tap toan » tap doan, tap quan, bai toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu manh) or (((chieu tinh) OR (trieu tinh)))) - canh tranh cua dang hung tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu manh) OR (((chieu tinh) OR (trieu tinh)))) - canh tranh cua dang hung tap toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu manh) or (((chieu tinh) OR (trieu tinh)))) - canh tranh cua dang hung tap toan ban".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu manh) or (((chieu tinh) OR (trieu tinh)))) - canh tranh cua dang hung tap toan ban*.