Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
su sach » vu sach
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (((so sach) OR (co sach)))) ty nang ma hoi. lieu va cam xuc va thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (((so sach) OR (co sach)))) ty nang ma hoi. lieu va cam xuc va thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (((so sach) OR (co sach)))) ty nang ma hoi. lieu va cam xuc va thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (((so sach) OR (co sach)))) ty nang ma hoi. lieu va cam xuc va thanh vi cua tre*.