Perhaps you should try some spelling variations:
tranh cua » doanh cua, manh cua
dung cong » dung trong
doan phan » doanh phan, toan phan, doanh nhan
cua tinh » cua sinh, va tinh, ha tinh
cua dung » cua dang, cua dong, qua dung
dan phan » dan chan, van phan, dam phan
va sinh » va kinh, va tinh, vi sinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: a ((cua tinh) or (va sinh)) - canh tranh cua dung cong ((dan phan) OR (doan phan)) cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: a ((cua tinh) OR (va sinh)) - canh tranh cua dung cong ((dan phan) OR (doan phan)) cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "a ((cua tinh) or (va sinh)) - canh tranh cua dung cong ((dan phan) OR (doan phan)) cac".
• Adding a wildcard symbol may retrieve word variants: a ((cua tinh) or (va sinh)) - canh tranh cua dung cong ((dan phan) OR (doan phan)) cac*.