Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
hoc thieu » toc thieu, hoc hien
va phuong » va thuong, cac phuong
thong dan » thong van, tuong dan, thong den
va thong » va thuong, he thong, va cong
dan van » dang van, doan van, dao van
van dau » van dao, phan dau

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 ((va thong) or (va phuong)) thong dan van dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu khang - canh tranh ((va thong) OR (va phuong)) thong dan van dau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu khang - canh tranh ((va thong) or (va phuong)) thong dan van dau*.