Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
hoc hieu » hoc thieu, hoc hien, doc hieu
san toan » manh toan, xuan toan, san doanh
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh

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 nganh - canh tranh cua nhung cong ((san toan) or (((dan toan) OR (van toan)))) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu nganh - canh tranh cua nhung cong ((san toan) OR (((dan toan) OR (van toan)))) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu nganh - canh tranh cua nhung cong ((san toan) or (((dan toan) OR (van toan)))) cao".
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - canh tranh cua nhung cong ((san toan) or (((dan toan) OR (van toan)))) cao*.