Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
phong tham » phong kham, chong tham, hong tham
trong van » trong cac
van khanh » van thanh, van hanh, van anh
tham dan » ham dan, tam dan, tham dam

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 sang) or (chieu sach)) - thanh trong van khanh phong tham dan ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sang) OR (chieu sach)) - thanh trong van khanh phong tham dan ca.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sang) or (chieu sach)) - thanh trong van khanh phong tham dan ca*.