Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
canh manh » lanh manh, canh tranh, cach mang
cua thong » cua thuong, cua khong, cua tong
hoc tran » hoc tan, hoc tren, boc tran
manh cua » doanh cua, ban cua
cong san » cong tac
than man » than ma, tran manh, than phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tran quang - canh manh cua thong cong san ((than man) OR (thanh san))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc tran quang - canh manh cua thong cong san ((than man) OR (thanh san))".
• Adding a wildcard symbol may retrieve word variants: hoc tran quang - canh manh cua thong cong san ((than man) OR (thanh san))*.