Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
lang toan » lang thang, lang thanh, quang toan
dang toan » dang tran, dan toan, dung 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)) manh - canh tranh cua nhung cong ((lang toan) or (dang toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (doc hieu)) manh - canh tranh cua nhung cong ((lang toan) OR (dang toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) OR (doc hieu)) manh - canh tranh cua nhung cong ((lang toan) or (dang toan)) cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) OR (doc hieu)) manh - canh tranh cua nhung cong ((lang toan) or (dang toan)) cao*.