Perhaps you should try some spelling variations:
nhung duong » nhung dung, nhung huong, nhung tuong
thieu sang » chieu sang, thieu khang, thieu quang
thanh tung » thanh cong
cua nhung » va nhung
duong anh » duong manh, duong xanh, duong vanh
tung cua » trung cua, tuong cua, dung cua
tuan cu » tuan tu, quan cua, tuan thu

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 sang) or (hieu qua)) - thanh tung cua nhung duong anh tuan cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (hieu qua)) - thanh tung cua nhung duong anh tuan cu.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (hieu qua)) - thanh tung cua nhung duong anh tuan cu*.