Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
nhung cong » thong cong, hang cong, nhung don
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
dung cong » dung trong
chan dau » phan dau, han dau, chuan dao
doan » doanh, toan, soan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu tinh - canh tranh cua ((nhung cong) or (dung cong)) dan ((chan dau) or (chan doan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - canh tranh cua ((nhung cong) OR (dung cong)) dan ((chan dau) OR (chan doan)).
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - canh tranh cua ((nhung cong) or (dung cong)) dan ((chan dau) or (chan doan))*.