Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien danh » thien danh, hien hanh, hien nhanh
tranh san » thanh san, trinh san, tranh ban
san nhung » sang nhung, ban nhung, sao nhung
cong toan » cong tan, cong hoan, cong tuan
phan dau » phan tu, hang dau
van hau » van ha, van hai, van dau

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 danh - canh tranh san nhung cong toan ((van hau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien danh - canh tranh san nhung cong toan ((van hau) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: hoc hien danh - canh tranh san nhung cong toan ((van hau) or (phan dau))*.