Perhaps you should try some spelling variations:
sach kho » bach khoa, sach dao, sach nha
kho tang » cao tang
tang van » dang van, hoang van, trong van
hanh dao » thanh dat, thanh dam, doanh dao
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
va cham » va chat, va tham
van hoi » van hoa, van hoc, van hoe
xuc va » duc va, tuc va, luc va
va cam » va cac, va cao, va cai

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 kho tang van hoi. hieu ((va cam) OR (va cham)) xuc va ((hanh dao) or (lanh dao)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach kho tang van hoi. hieu ((va cam) OR (va cham)) xuc va ((hanh dao) OR (lanh dao)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach kho tang van hoi. hieu ((va cam) OR (va cham)) xuc va ((hanh dao) or (lanh dao)) cua tre*".