Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien tinh » khien tinh, thien tinh, bien tinh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong san » cong tac
toan tai » doanh tai, toan ban, toan cao
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien tinh - canh tranh cua nhung cong san ((toan tai) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien tinh - canh tranh cua nhung cong san ((toan tai) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc hien tinh - canh tranh cua nhung cong san ((toan tai) or (toan tap))*.