Perhaps you should try some spelling variations:
thiet danh » thien danh, thien anh, tiep danh
thien dang » thien bang, thien danh, thien nang
dong doanh » dung doanh, trong doanh, doanh doanh
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong doan » cong dan, cong hoan, cong san
phan cac » nhan cach, phan dau, phan lap

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

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