Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, dieu khien
sach nuoc » cac nuoc, bach tuoc, dich nuoc
sach duoc » sach dao, sach dung, sinh duoc
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
vi cua » vai cua, di cua
cua cu » cua chu, cua cau, cua su
x hoi » xa hoi, o hoi, x ho

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: "so sach ky nang x hoi. hieu thien ((sach nuoc) OR (sach duoc)) va danh vi cua cu~".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang x hoi. hieu thien ((sach nuoc) OR (sach duoc)) va danh vi cua cu*.