Perhaps you should try some spelling variations:
thanh cuong » thanh chuong, thanh cong, thanh huong
cuong quan » luong quan, vuong quan, luong quang
dung duong » dung dong, dong duong, dung dung
hien hanh » dieu hanh
quan dung » quang dung, quan duong, qua dung
duong anh » duong manh, duong xanh, duong vanh
quang cao » nang cao, quang nam
tuan cao » toan cao, juan cao, thuan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thi thanh) or (hien hanh)) - thanh cuong quan dung duong anh ((tuan cao) OR (quang cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thi thanh) OR (hien hanh)) - thanh cuong quan dung duong anh ((tuan cao) OR (quang cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thi thanh) or (hien hanh)) - thanh cuong quan dung duong anh ((tuan cao) OR (quang cao))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thi thanh) or (hien hanh)) - thanh cuong quan dung duong anh ((tuan cao) OR (quang cao))*.