Perhaps you should try some spelling variations:
xa thanh » va thanh, gia thanh, ban thanh
ta thanh » tai thanh, va thanh, tran thanh
ha thanh » va thanh, pham thanh, phan thanh
bo sach » co sach, hoc sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
cac tuc » cac toc, cac tu, cac tac
doi cua » dai cua, hoi cua
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: bo sach ky nang cao hoi. lieu va cac tuc ((xa thanh) or (((ta thanh) or (ha thanh)))) doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach ky nang cao hoi. lieu va cac tuc ((xa thanh) OR (((ta thanh) OR (ha thanh)))) doi cua tre.
• Adding a wildcard symbol may retrieve word variants: bo sach ky nang cao hoi. lieu va cac tuc ((xa thanh) or (((ta thanh) or (ha thanh)))) doi cua tre*.