Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
tang van » dang van, hoang van, trong van
tu sach » thu sach, su sach, te sach
sach ha » sach nha, sach han, sach xa
cua tre » cua te, cuu tre, cua triet
van hoi » van hoa, van hoc, van hoe
ha tang » phap tang, cao tang, kho tang
va cao » va cac, va co, va dao
va cam » va cham, va cac, va cai
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ha tang van hoi. hieu ((va cam) OR (va cao)) xuc va ((thanh dat) or (lanh dao)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ha tang van hoi. hieu ((va cam) OR (va cao)) xuc va ((thanh dat) OR (lanh dao)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ha tang van hoi. hieu ((va cam) OR (va cao)) xuc va ((thanh dat) or (lanh dao)) cua tre*".