Perhaps you should try some spelling variations:
tang luan » dung luan
hang cong » dang cong, hang nong, bang cong
khao cuu » chao chu, kho cua, thao cua
cham cuu » cap cuu, chat cua
hang cua » mang cua, hang ca, huong cua
cong san » cong tac
san than » sang than, san thanh, ban than
than man » than ma, thanh san, tran manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((khao cuu) OR (cham cuu)) van - hanh ((hang cua) or (tang luan)) hang cong san than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((khao cuu) OR (cham cuu)) van - hanh ((hang cua) OR (tang luan)) hang cong san than man.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((khao cuu) OR (cham cuu)) van - hanh ((hang cua) or (tang luan)) hang cong san than man".
• Adding a wildcard symbol may retrieve word variants: ((khao cuu) OR (cham cuu)) van - hanh ((hang cua) or (tang luan)) hang cong san than man*.