Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
sang trong » lang trong, mang trong, nang trong
tinh quan » tinh quang, trinh quan, tin quan
luan sang » luan nang, luan san, lua sang
trong tan » trong quan, trong cac, trong ca
tran van » luan van

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)) - tinh quan luan sang trong tan tran van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sang) OR (chieu sach)) - tinh quan luan sang trong tan tran van.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sang) or (chieu sach)) - tinh quan luan sang trong tan tran van*.