Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
nam duoc » nam thuoc, da duoc, dat duoc
mai khoi » mai khoa, tai khoa, cac khoi
te sach » toc sach
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
ky sang » ky nang, ky tang, duy sang
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ky sang) or (ky dang)) mai khoi. hieu ve ((nam duoc) or (cam xuc)) va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky sang) OR (ky dang)) mai khoi. hieu ve ((nam duoc) OR (cam xuc)) va hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((ky sang) or (ky dang)) mai khoi. hieu ve ((nam duoc) or (cam xuc)) va hanh dai cua tre*.