Perhaps you should try some spelling variations:
thanh trung » thanh tung
dung phuong » dung thuong, bang phuong, dung chung
thieu xanh » chieu xanh, thien anh, thien danh
phuong van » phung van, phong van, phuong lan
hieu manh » chieu xanh, hieu nganh, dieu hanh
cua dung » cua dang, cua dong, qua dung
van than » van thanh, van thang, van tuan
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: hoc ((thieu xanh) OR (hieu manh)) - ((thanh trung) or (canh tranh)) cua dung phuong van than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - ((thanh trung) OR (canh tranh)) cua dung phuong van than man.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - ((thanh trung) or (canh tranh)) cua dung phuong van than man".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (hieu manh)) - ((thanh trung) or (canh tranh)) cua dung phuong van than man*.