Perhaps you should try some spelling variations:
sang than » cang thang, dang thanh, sang tao
dang xay » dang van, van xay
thu sach » thuat sach, thuoc sach, thu hoach
than cua » nhan cua, thai cua, ban cua
tu sach » su sach, te sach, tu cach
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
thi van » thi lan, thi hanh, thi nang
van dat » van dao, van dau, dan dat
va sang » van sang, vua sang, va nang
cua tre » cua te, cuu tre, cua triet
nuoc » quoc, duoc, ngoc

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 dang xay hoi. thi van dat 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 dang xay hoi. thi van dat nuoc va sang than cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) ky dang xay hoi. thi van dat nuoc va sang than cua tre*.