Perhaps you should try some spelling variations:
tcanh tranh » thanh thanh, can tranh, lanh tranh
trong quang » truong quang, thong quang, trong quan
chieu sang » chieu sach, chieu xanh, hieu lang
quan hoang » luan hoan
quang toan » quang tuan, quang tran, quang doan
doi chieu » doc hieu, doi chi, ho chieu
cua hoang » cua hang, tuan hoang, xuan hoang
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: doi chieu sang - ((canh tranh) or (tcanh tranh)) ((cua hoang) OR (quan hoang)) trong quang toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - ((canh tranh) OR (tcanh tranh)) ((cua hoang) OR (quan hoang)) trong quang toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - ((canh tranh) or (tcanh tranh)) ((cua hoang) OR (quan hoang)) trong quang toan ban".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - ((canh tranh) or (tcanh tranh)) ((cua hoang) OR (quan hoang)) trong quang toan ban*.