Perhaps you should try some spelling variations:
thanh co » thanh do, thanh ca, thanh ho
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
nang o » nang co, nang ho, nang ro
va cao » va cac, va co, va dao
xuc va » duc va, tuc va, luc va
co cua » con cua, ca cua, cong cua
va cam » va cham, va cac, va cai
o hoc » co hoc, mo hoc, so hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (te sach)) ky nang o hoc. hieu ((va cam) OR (va cao)) xuc va thanh co cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (te sach)) ky nang o hoc. hieu ((va cam) OR (va cao)) xuc va thanh co cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (te sach)) ky nang o hoc. hieu ((va cam) OR (va cao)) xuc va thanh co cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (te sach)) ky nang o hoc. hieu ((va cam) OR (va cao)) xuc va thanh co cua tre*.