Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, chau tinh, kieu tinh
lieu tinh » trieu tinh, diep tinh, bien tinh
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 cao » toan ban, toan tap

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

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