Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cam bang » cam nang, cao bang, cac bang
can bang » cao bang, can ban, van ban
cong tan » cong tac, cong san, cong thanh
tan san » tai san, tan van, han san
san cao » san co, san cho, san bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien thanh) or (hieu manh)) - canh tranh ((cam bang) OR (can bang)) cong tan san cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (hieu manh)) - canh tranh ((cam bang) OR (can bang)) cong tan san cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien thanh) or (hieu manh)) - canh tranh ((cam bang) OR (can bang)) cong tan san cao*".