Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh dai » hanh tai, hanh dao, vanh dai
hieu ve » hieu van
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
x hoi » xa hoi, o hoi, x ho

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: ((thu hoach) OR (thuat sach)) ky nang x hoi. ((hieu ve) OR (hieu va)) cam xuc va hanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu hoach) or (thuat sach)) ky nang x hoi. ((hieu ve) OR (hieu va)) cam xuc va hanh dai cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (thuat sach)) ky nang x hoi. ((hieu ve) OR (hieu va)) cam xuc va hanh dai cua tre*.