Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
lang thanh » dang thanh, tang thanh, lang thang
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
lang toan » dang toan, lang thang, quang toan
hoc hieu » hoc thieu, hoc hien, hoc dieu
doc hieu » toc thieu, hoc thieu, hoc hien

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