Perhaps you should try some spelling variations:
lanh tranh » lan tranh, hanh trinh, sach tranh
chieu sang » chieu sach, chieu xanh, nhieu tang
phong cong » phong chong, thong cong, chong cong
hieu lang » hieu quang, nhieu tang, hieu van
va phong » van phong, va phuong, va thong
cong dan » cong san, cong tan, huong dan
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: ho ((chieu sang) OR (hieu lang)) - ((lanh tranh) or (canh tranh)) va phong cong dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - ((lanh tranh) OR (canh tranh)) va phong cong dan than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) OR (hieu lang)) - ((lanh tranh) or (canh tranh)) va phong cong dan than ban".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) OR (hieu lang)) - ((lanh tranh) or (canh tranh)) va phong cong dan than ban*.