Perhaps you should try some spelling variations:
qua nhan » cua nhan, qua nhat, qua phan
hanh doi » thanh doi, hanh noi, hang doi
su sach » so sach
vu sach » vu bach, vu khach
nang ma » tang ma, sang ma, nang cao
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
luc va » tuc va, loc va

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) OR (vu sach)) y nang ma hoi. hieu qua nhan ((luc va) OR (duc va)) hanh doi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) y nang ma hoi. hieu qua nhan ((luc va) or (duc va)) hanh doi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) y nang ma hoi. hieu qua nhan ((luc va) or (duc va)) hanh doi cua tre*.