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

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 van) OR (luoc van)) 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 van) OR (luoc van)) 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 van) OR (luoc van)) hanh doi cua tre*.