Perhaps you should try some spelling variations:
sang than » cang thang, dang thanh, sang tao
thu sach » thuat sach, thuoc sach, thu hoach
than cua » nhan cua, thai cua, ban cua
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
van dat » van dao, dan dat, van dan
van dau » van dao, phan dau
va sang » van sang, vua sang, va nang
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: ((thu sach) or (tu sach)) ky nang xa hoi. thien ((van dat) or (van dau)) nuoc va sang than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ky nang xa hoi. thien ((van dat) OR (van dau)) nuoc va sang than cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) ky nang xa hoi. thien ((van dat) or (van dau)) nuoc va sang than cua tre*.