Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
vu dinh » quy dinh
va dinh » van dinh, va kinh, va sinh
va tinh » may tinh
cham xu » chao xu, cham cuu, chat xuc
va cham » va chat, va tham
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu va cham xu ((va tinh) or (((va dinh) OR (vu dinh)))) va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. hieu va cham xu ((va tinh) OR (((va dinh) OR (vu dinh)))) va cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang x hoi. hieu va cham xu ((va tinh) or (((va dinh) OR (vu dinh)))) va cua tre*".