Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
doi chieu » doc hieu, ho chieu, mot chieu
tranh cua » doanh cua, manh cua
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
pham can » pham van, pham ca, pham san
pham lan » pham luan, pham van, phan lan
doi chi » doi khi

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) or (doi chi)) xanh - canh tranh cua dung cong thanh ((pham can) or (pham lan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doi chi)) xanh - canh tranh cua dung cong thanh ((pham can) OR (pham lan)).
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doi chi)) xanh - canh tranh cua dung cong thanh ((pham can) or (pham lan))*.