Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
thu sach » tu sach, thuat sach, thuoc sach
tai cua » thai cua, tai cuc, tri cua
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang ((ma hoi) or (mai hoi)). hieu ve cham ((xuc va) OR (tuc va)) thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((ma hoi) OR (mai hoi)). hieu ve cham ((xuc va) OR (tuc va)) thanh tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang ((ma hoi) or (mai hoi)). hieu ve cham ((xuc va) OR (tuc va)) thanh tai cua tre*".