Perhaps you should try some spelling variations:
nhung luong » hung luong, nhung huong, nhung tuong
anh truong » manh truong, anh thuong, anh trong
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
truong va » truong dai, truong cao, truong dao
van toan » van tuan, van tan, van thanh
va toan » bai toan, tap toan, va thanh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) OR (hieu lang)) - anh truong va nhung luong ((va toan) or (van toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu lang)) - anh truong va nhung luong ((va toan) OR (van toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) OR (hieu lang)) - anh truong va nhung luong ((va toan) or (van toan)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) OR (hieu lang)) - anh truong va nhung luong ((va toan) or (van toan)) ban*.