Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh dai » hanh tai, hanh dao, vanh dai
chat xuc » chat huu, cam xuc, chao xu
va hanh » van hanh, va thanh, va danh
hieu va » hieu qua
lang xa » dang xay, lang van
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y ((lang xa) or (lang ha)) hoi. ((hieu va) or (lieu va)) chat xuc va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y ((lang xa) OR (lang ha)) hoi. ((hieu va) OR (lieu va)) chat xuc va hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: thuat sach y ((lang xa) or (lang ha)) hoi. ((hieu va) or (lieu va)) chat xuc va hanh dai cua tre*.