Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
ky sang » ky dang, ky tang, duy sang
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ky sang) or (ky nang)) ma hoa. hieu ve cham xuc ((va danh) OR (va hanh)) tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky sang) OR (ky nang)) ma hoa. hieu ve cham xuc ((va danh) OR (va hanh)) tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky sang) or (ky nang)) ma hoa. hieu ve cham xuc ((va danh) OR (va hanh)) tai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky sang) or (ky nang)) ma hoa. hieu ve cham xuc ((va danh) OR (va hanh)) tai cua tre*.