Perhaps you should try some spelling variations:
thanh de » hanh de, thanh ve, thanh do
thanh di » thanh doi, thanh do, thanh dinh
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
va cam » va cham, va cao, va cai
ma hoi » mai hoi, xa hoi, ma hoa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. lieu ((va cam) OR (va cac)) luc va ((thanh di) OR (thanh de)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. lieu ((va cam) OR (va cac)) luc va ((thanh di) or (thanh de)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. lieu ((va cam) OR (va cac)) luc va ((thanh di) or (thanh de)) cua tre*.