Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thanh tuong » thanh thuong, thanh tung, thanh huong
nhung huong » nhung phuong, nhung tuong, nhung cong
thieu sang » chieu sang, thieu quang, hieu lang
tuong ban » tuong bang, trong ban, tuong dan
ban nhung » san nhung, ban phuong, gian nhung
van thanh » ban thanh, van tuan
dan than » dan chan, ban than, van than

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 tuong ban nhung huong ((dan than) or (van thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu khang)) - thanh tuong ban nhung huong ((dan than) OR (van thanh)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (thieu khang)) - thanh tuong ban nhung huong ((dan than) or (van thanh)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) OR (thieu khang)) - thanh tuong ban nhung huong ((dan than) or (van thanh)) cau*.