Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
cua nhung » va nhung
khoan cam » khoa cam, phan cam, thuan cam
cong cac » cuong cac, cong tac, cong cau
khoan va » doan va, khoa ma, nhan va

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 (theo tieu)) xanh - canh tranh cua nhung cong cac ((khoan cam) OR (khoan va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo tieu)) xanh - canh tranh cua nhung cong cac ((khoan cam) OR (khoan va)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (theo tieu)) xanh - canh tranh cua nhung cong cac ((khoan cam) OR (khoan va))".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo tieu)) xanh - canh tranh cua nhung cong cac ((khoan cam) OR (khoan va))*.