Perhaps you should try some spelling variations:
sach nguoi » tich nguoi, soc nguoi, tac nguoi
thieu dien » thieu nien, thieu bien, tieu dien
dien sach » dien anh
nguoi san » nguoi tay, nguoi dao, nguoi ma
dang xay » dang van, van xay
van tuan » van quan, van ban, anh tuan
tuan cua » quan cua, than cua, tan cua
tu sach » thu sach, su sach, te sach
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
san van » tan van, luan van, tran van
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu hoach) OR (tu sach)) ky dang xay hoi. thieu dien sach nguoi san van tuan cua tre~.
• Adding a wildcard symbol may retrieve word variants: ((thu hoach) or (tu sach)) ky dang xay hoi. thieu dien sach nguoi san van tuan cua tre*.