Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thanh trung » thanh tung
nhung duong » nhung huong, nhung tuong, chuong duong
thieu sang » chieu sang, thieu quang, hieu lang
nhung dung » phuong dung, ung dung, thong dung
trung cua » truong cua, trung tuan, trung cap
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 (thieu khang)) - thanh trung cua ((nhung duong) OR (nhung dung)) anh tuan cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu khang)) - thanh trung cua ((nhung duong) OR (nhung dung)) anh tuan cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (thieu khang)) - thanh trung cua ((nhung duong) OR (nhung dung)) anh tuan cu".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (thieu khang)) - thanh trung cua ((nhung duong) OR (nhung dung)) anh tuan cu*.