Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
quang toan » quang tuan, quang tran, quang doan
tranh cua » doanh cua, manh cua
cua nhung » va nhung
vang toan » van toan, dang toan, vang trang
hoc lieu » hoc dieu, hoc sieu, ho lieu
hoc tieu » hoc thieu, hoc dieu, hoc sieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc lieu) or (hoc tieu)) tinh - canh tranh cua nhung cong ((vang toan) OR (quang toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc lieu) OR (hoc tieu)) tinh - canh tranh cua nhung cong ((vang toan) OR (quang toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc lieu) or (hoc tieu)) tinh - canh tranh cua nhung cong ((vang toan) OR (quang toan)) ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc lieu) or (hoc tieu)) tinh - canh tranh cua nhung cong ((vang toan) OR (quang toan)) ban*.