Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
chieu xanh » chieu sach, chieu sang, chieu tinh
canh tran » canh tranh, hanh trang, banh trang
hang cong » dang cong, hang nong, bang cong
ho chieu » theo chieu, hoc thieu, doi chieu
tran van » luan van
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu xanh - canh tran van ((nhung cong) or (hang cong)) dan ((phan cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - canh tran van ((nhung cong) OR (hang cong)) dan ((phan cau) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - canh tran van ((nhung cong) or (hang cong)) dan ((phan cau) or (phan dau))*.