Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, bieu hien
hach nuoc » sach nuoc, hoc nuoc, cac nuoc
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
vi cua » vai cua, di cua
cua cu » cua chu, cua cau, cua su

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 xa hoi. ((hieu thien) OR (dieu khien)) hach nuoc va hanh vi cua cu~".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang xa hoi. ((hieu thien) OR (dieu khien)) hach nuoc va hanh vi cua cu*.