Perhaps you should try some spelling variations:
tham xuc » tham nuoc, tham thuc, pham duc
tu sach » thu sach, su sach, te sach
cao hoi » cau hoi, co hoi, tao hoi
cao hoc » co hoc, cho hoc, chat hoc
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
va hanh » van hanh, va thanh, va danh
kem cua » em cua, keo cua, diem cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va

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 y nang ((cao hoi) OR (cao hoc)). hieu va tham xuc va hanh kem cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((cao hoi) OR (cao hoc)). hieu va tham xuc va hanh kem cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((cao hoi) OR (cao hoc)). hieu va tham xuc va hanh kem cua tre*.