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 » so sach, vu sach
ty hang » ly hang, ty xang, thi hang
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, ma hoa, me hoi
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 ((ty hang) or (ky nang)) ((ma hoi) OR (mai 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 ((ty hang) OR (ky nang)) ((ma hoi) OR (mai 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 ((ty hang) or (ky nang)) ((ma hoi) OR (mai hoi)). lieu va cam xuc va thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty hang) or (ky nang)) ((ma hoi) OR (mai hoi)). lieu va cam xuc va thanh vi cua tre*.