Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
lang thanh » dang thanh, tang thanh, lang thang
hieu manh » chieu xanh, hieu nganh, dieu hanh
van nhung » van nhuong, van hung, van phung
cong lang » cong vang, cong luong, cong quang
thanh cao » thanh ca, thanh cac, thanh thao

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)) - canh tranh ((van nhung) OR (va nhung)) cong lang thanh cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - canh tranh ((van nhung) OR (va nhung)) cong lang thanh cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (hieu manh)) - canh tranh ((van nhung) OR (va nhung)) cong lang thanh cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu manh)) - canh tranh ((van nhung) OR (va nhung)) cong lang thanh cao*.