Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
cua tre » cua te, cuu tre, dua tren
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
va dan » ca dan, va dao, va dau
dan le » ban le, van le, dan ve
x hoi » o hoi, x ho, 5 hoi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y nang ((x hoi) OR (xa hoi)). hieu va cam luc va dan le ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach y nang ((x hoi) or (xa hoi)). hieu va cam luc va dan le ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang ((x hoi) or (xa hoi)). hieu va cam luc va dan le ((cua tre) OR (cua triet))*.