Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
lieu quan » lien quan, hieu qua, lieu van
tranh va » tranh van, trang va, trinh va
cong san » cong tac
toan tai » doanh tai, toan ban, toan cao
toan tap » toan ban
ho lieu » so lieu, co lieu, ho kieu

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

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