Perhaps you should try some spelling variations:
hanh tranh » hanh trinh, hanh trang, lanh tranh
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung dong » nhung don, nhung cong, nhung dung
hieu lang » hieu quang, nhieu tang, hieu van
cua nhung » va nhung
dong tinh » dong kinh, dong tin, cong tinh
toan ban » van ban

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)) - ((hanh tranh) OR (canh tranh)) cua nhung dong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - ((hanh tranh) OR (canh tranh)) cua nhung dong tinh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - ((hanh tranh) OR (canh tranh)) cua nhung dong tinh toan ban".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - ((hanh tranh) OR (canh tranh)) cua nhung dong tinh toan ban*.