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 dan » tung dan, xuong dan, truong dai
dan nhung » ban nhung, dap nhung, san nhung
phan cac » phan dau, phan lap, phan van

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