Perhaps you should try some spelling variations:
chieu chien » thien chien, hieu hien
thieu nien » thien nhien
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
cach tu » cach thuc
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
di cua » dai cua, doi cua, de cua
tu sac » tu sach, tu cac, tu san
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 sac ky nang x hoi. ((thieu nien) or (chieu chien)) cach tu ((ban hanh) or (van hanh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang x hoi. ((thieu nien) OR (chieu chien)) cach tu ((ban hanh) OR (van hanh)) di cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang x hoi. ((thieu nien) or (chieu chien)) cach tu ((ban hanh) or (van hanh)) di cua tre*.