Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
quan nhung » cua nhung, luan chung, quang hung
lang thang » cang thang, dang thanh, hung thang
hieu manh » chieu xanh, hieu nganh, dieu hanh
qua nhung » cua nhung, qua chung, chua nhung
cong lang » cong vang, cong luong, cong quang
thang cao » thong cao, thang lao, nang cao

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