Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
cham xuc » cam xuc, chat xuc, cham soc
tu sach » su sach, te sach, tu cach
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
tu cham » toc cham, thi cham
hieu tu » chieu tu, hieu tuc, hien tu
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua
o hoi » co hoi, o hai, o hoa
o hoc » co hoc, mo hoc, so hoc

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