Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
cac luc » cau luc, coc luc, cac nuoc
va danh » va dinh, va dan, va hanh
cho cua » co cua, chi cua, cho ca
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, me hoi
luc va » duc va, tuc va, loc 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 ((ma hoi) or (ma hoa)). hieu va cac luc va danh cho cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((ma hoi) OR (ma hoa)). hieu va cac luc va danh cho cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((ma hoi) or (ma hoa)). hieu va cac luc va danh cho cua tre*.