Perhaps you should try some spelling variations:
pham duy » pham duc
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
hieu tu » chieu tu, hieu tuc, hien tu
tu pham » thu pham, su pham, tu phat
duy van » duy vat, dung van
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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 x hoi. hieu tu pham duy van hanh di cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu tu pham duy van hanh di cua tre*.