Perhaps you should try some spelling variations:
nang lai » nang tai, mang lai, nang cai
su sach » so sach
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
hieu ve » hieu van
cua tre » cua te, cuu tre, cua triet
lai hoi » dai hoi, lai hoa, lai roi
vu sach » vu bach, vu khach
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu sach)) y nang lai hoi. ((hieu ve) or (hieu va)) cam luc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) y nang lai hoi. ((hieu ve) OR (hieu va)) cam luc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) y nang lai hoi. ((hieu ve) or (hieu va)) cam luc va hanh vi cua tre*.