Perhaps you should try some spelling variations:
trong quang » truong quang, thong quang, trong quan
phuong cong » phuong dong, phung cong, phuong hoang
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hinh trong » chinh trong, dinh trong, sinh trong
phong cong » phong chong, thong cong, chong cong
ban ban » ban banh, can ban, ban dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chieu sang)) - hinh trong quang ((phuong cong) OR (phong cong)) van ban ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - hinh trong quang ((phuong cong) OR (phong cong)) van ban ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chieu sang)) - hinh trong quang ((phuong cong) OR (phong cong)) van ban ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu sang)) - hinh trong quang ((phuong cong) OR (phong cong)) van ban ban*.