Perhaps you should try some spelling variations:
tranh cua » doanh cua, manh cua
cua sinh » hoa sinh
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
phan cac » nhan cach, phan dau, phan lap
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 sinh) or (va sinh)) - canh tranh cua dung ((cong dan) OR (cong tan)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: a ((cua sinh) OR (va sinh)) - canh tranh cua dung ((cong dan) OR (cong tan)) phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "a ((cua sinh) or (va sinh)) - canh tranh cua dung ((cong dan) OR (cong tan)) phan cac".
• Adding a wildcard symbol may retrieve word variants: a ((cua sinh) or (va sinh)) - canh tranh cua dung ((cong dan) OR (cong tan)) phan cac*.