Perhaps you should try some spelling variations:
nganh toan » nganh thanh, thanh toan, manh toan
hieu lang » chieu sang, hieu quang, nhieu tang
hang cong » dang cong, hang nong, bang cong
hoc hieu » hoc thieu, hoc hien, doc hieu
tranh va » tranh van, trang va, trinh va
anh toan » manh toan, thanh toan, tinh toan
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - canh tranh va hang cong ((((anh toan) OR (nganh toan))) or (anh tuan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - canh tranh va hang cong ((((anh toan) OR (nganh toan))) OR (anh tuan)) ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu lang - canh tranh va hang cong ((((anh toan) OR (nganh toan))) or (anh tuan)) ban*".