Perhaps you should try some spelling variations:
thien van » thi van
van thuan » van tuan, van than, van quan
thuan doc » than doc, thuat doc, thuat duoc
thu sach » tu sach, thuat sach, thuoc sach
san benh » sau benh, tai benh, so benh
ban benh » ba benh, ban banh, can benh
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach _ lang xa hoi. thien van thuan doc ((ban benh) OR (san benh)) vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach _ lang xa hoi. thien van thuan doc ((ban benh) OR (san benh)) vi ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach _ lang xa hoi. thien van thuan doc ((ban benh) OR (san benh)) vi ((cua tre) or (cuu tre))*".