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 dan » cong san, cong tan, huong dan
toan cao » toan ban
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 dan ((((von tai) or (toan cao))) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu quan - canh tranh va nhung cong dan ((((von tai) OR (toan cao))) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ho lieu quan - canh tranh va nhung cong dan ((((von tai) or (toan cao))) or (toan tap))*.