Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hieu lang » chieu sang, hieu quang, nhieu tang
tinh ninh » ninh binh
duong anh » duong manh, duong xanh, duong vanh
tuan ban » tuan bang, toan ban, luan ban
va hang » van hang, va nang, va hanh
va lang » va nang, hoa lang

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 (hieu lang)) - tinh ninh ((va hang) OR (va lang)) duong anh tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (hieu lang)) - tinh ninh ((va hang) OR (va lang)) duong anh tuan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (hieu lang)) - tinh ninh ((va hang) OR (va lang)) duong anh tuan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (hieu lang)) - tinh ninh ((va hang) OR (va lang)) duong anh tuan ban*.