Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
ban anh » ban hanh, ban banh, ban danh
cau xuc » cau luc, cau truc, chat xuc
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, ma hoa, me hoi
anh di » danh di, xanh di, anh d
di cua » dai cua, doi cua, de cua

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 ((ma hoi) OR (mai hoi)). hieu van ((cau xuc) or (cam xuc)) ban anh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((ma hoi) OR (mai hoi)). hieu van ((cau xuc) OR (cam xuc)) ban anh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ((ma hoi) OR (mai hoi)). hieu van ((cau xuc) or (cam xuc)) ban anh di cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((ma hoi) OR (mai hoi)). hieu van ((cau xuc) or (cam xuc)) ban anh di cua tre*.