Perhaps you should try some spelling variations:
chieu chien » thien chien
hieu hien » bieu hien, dieu hien, dieu khien
bach tu » bach thu, cach tu, bac tu
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
ca dan » ca dao
vi cua » vai cua, di 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 ky nang x hoi. ((hieu hien) OR (chieu chien)) bach tu ((ca dan) or (cac dan)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. ((hieu hien) OR (chieu chien)) bach tu ((ca dan) OR (cac dan)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. ((hieu hien) OR (chieu chien)) bach tu ((ca dan) or (cac dan)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. ((hieu hien) OR (chieu chien)) bach tu ((ca dan) or (cac dan)) vi cua tre*.