Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu manh » chieu xanh, hieu nganh, hien hanh
quan bang » quan lang, quan hoang, quan quang
tuan bang » tuan dang, tuan hoang, thuat bang
cong ban » cong bang, cong san, cong tan
ban hang » ngan hang
hang cau » hang dau, hang ca, nhung cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu manh) OR (dieu hanh)) - thanh trung ((quan bang) or (tuan bang)) cong ban hang cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu manh) OR (dieu hanh)) - thanh trung ((quan bang) OR (tuan bang)) cong ban hang cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu manh) OR (dieu hanh)) - thanh trung ((quan bang) or (tuan bang)) cong ban hang cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu manh) OR (dieu hanh)) - thanh trung ((quan bang) or (tuan bang)) cong ban hang cau*.