Perhaps you should try some spelling variations:
te sach » toc sach
hieu va » lieu va, hieu qua
hai cua » thai cua, dai cua, hoi cua
anh hai » lanh hai, manh hai, anh thai
ban anh » ban hanh, ban banh, ban danh
cuc ban » cua ban, cac ban, cuu ban
cam cuc » cam xuc, cham cuu, pham cuc
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu van
xay hoi » tay hoi, cay phoi, gay thoi
ky dang » ky nang, ky danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky dang ((xay hoi) OR (xa hoi)). ((hieu ve) or (hieu va)) cam cuc ban anh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang ((xay hoi) OR (xa hoi)). ((hieu ve) OR (hieu va)) cam cuc ban anh hai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang ((xay hoi) OR (xa hoi)). ((hieu ve) or (hieu va)) cam cuc ban anh hai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang ((xay hoi) OR (xa hoi)). ((hieu ve) or (hieu va)) cam cuc ban anh hai cua tre*.