Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thieu » toc thieu, hoc hien
va phuong » va thuong, cac phuong
va thong » va thuong, he thong, va cong
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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 - hanh tranh ((va thong) OR (va phuong)) huong dan than ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh tranh ((va thong) OR (va phuong)) huong dan than ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh tranh ((va thong) OR (va phuong)) huong dan than ban*.