Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu xanh » chieu sang, chieu tinh, hieu manh
lang trong » dung trong, cong trong, dong trong
tin quan » tinh quang, trinh quan, lien quan
quan lua » quan luan, quan cua, quang cua
lua lang » cua lang, dua lang, lua sang
trong va » trong van, trong ca, trong cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sach) or (chieu xanh)) - tin quan lua lang trong va van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sach) OR (chieu xanh)) - tin quan lua lang trong va van ban.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sach) or (chieu xanh)) - tin quan lua lang trong va van ban*.