Perhaps you should try some spelling variations:
hieu cua » hieu qua, dieu cua, bieu cua
cua nhan » ca nhan, cua ngan, cua nha
nhan duc » nhan duoc, nhan luc, phan duc
danh doi » danh di, thanh doi, dung doi
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
va danh » va dinh, va dan, va hanh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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

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