Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
hieu van » hieu va, thien van, lieu va
van chat » cao chat
ky tang » ky nang, ky dang, kho tang
va hanh » va thanh, va danh, ban hanh
ky sang » ky nang, ky dang, duy sang
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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 sang) OR (ky tang)) ma hoi. hieu van chat xuc ((va hanh) or (van hanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ky sang) OR (ky tang)) ma hoi. hieu van chat xuc ((va hanh) OR (van hanh)) vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ky sang) OR (ky tang)) ma hoi. hieu van chat xuc ((va hanh) or (van hanh)) vai cua tre*".