Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
tranh cua » manh cua
doanh cua » doanh luan
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 khang - canh ((tranh cua) OR (doanh cua)) nhung cong ((dan toan) or (dan than)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu khang - canh ((tranh cua) OR (doanh cua)) nhung cong ((dan toan) OR (dan than)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu khang - canh ((tranh cua) OR (doanh cua)) nhung cong ((dan toan) or (dan than)) tap".
• Adding a wildcard symbol may retrieve word variants: hoc thieu khang - canh ((tranh cua) OR (doanh cua)) nhung cong ((dan toan) or (dan than)) tap*.