Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thien van » thi van
thanh tai » thanh hai, thanh toan, doanh tai
va thanh » gia thanh, ban thanh, va tinh
tai cua » thai cua, tai cuc, tri cua
cam luc » cam xuc, cau luc
van cam » van nam, van lam, van cau
su sach » so sach, vu sach
xay hoi » tay hoi, cay phoi, gay thoi
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
ky van » ly van, ty van, ky va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuat sach)) ky van ((xay hoi) OR (xa hoi)). thien van cam luc va thanh tai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (thuat sach)) ky van ((xay hoi) OR (xa hoi)). thien van cam luc va thanh tai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuat sach)) ky van ((xay hoi) OR (xa hoi)). thien van cam luc va thanh tai cua tre*.