Perhaps you should try some spelling variations:
cong toan » cong tan, cong hoan, cong doan
cong tuan » cong tan, cong thanh, cong quang
cong luan » tong luan, dong luan, cong luong
chi hanh » chi nhanh, chi thanh, thi hanh
tranh va » tranh van, trang va, trinh va
phan dau » phan tu, hang dau
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 chi hanh - canh tranh va nhung ((cong toan) or (((cong tuan) OR (cong luan)))) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi hanh - canh tranh va nhung ((cong toan) OR (((cong tuan) OR (cong luan)))) phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi hanh - canh tranh va nhung ((cong toan) or (((cong tuan) OR (cong luan)))) phan dau".
• Adding a wildcard symbol may retrieve word variants: doi chi hanh - canh tranh va nhung ((cong toan) or (((cong tuan) OR (cong luan)))) phan dau*.