Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thieu lang » hieu lang, thieu quang, chieu sang
thanh tung » thanh cong
hang cong » dang cong, hang nong, bang cong
tung cua » trung cua, tuong cua, dung cua
cua hang » cua dang, cua nhung, cua cong
dan toan » van toan, manh toan, xuan toan
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 lang) OR (thieu khang)) - thanh tung cua hang cong ((dan toan) or (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu lang) OR (thieu khang)) - thanh tung cua hang cong ((dan toan) OR (dan than)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu lang) OR (thieu khang)) - thanh tung cua hang cong ((dan toan) or (dan than)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu lang) OR (thieu khang)) - thanh tung cua hang cong ((dan toan) or (dan than)) cao*.