Perhaps you should try some spelling variations:
tdanh trung » thanh trung, thanh tung, dang trung
danh trung » dang trung, dinh trung, manh trung
hien xanh » hien hanh, hien nhanh, chieu xanh
tuan dang » tran dang, tuan bang, tuan dung
dang cong » dung cong
dan than » dan chan, ban than, van than
van toan » van tuan, van tan, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - ((danh trung) or (tdanh trung)) tuan dang cong ((dan than) or (van toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((danh trung) OR (tdanh trung)) tuan dang cong ((dan than) OR (van toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((danh trung) or (tdanh trung)) tuan dang cong ((dan than) or (van toan)) cau*.