Perhaps you should try some spelling variations:
dang xay » dang van, van xay
mua dan » cua dan, mua ban, cua dang
mua van » ma van, mua ban, qua van
tu sach » thu sach, te sach, tu cach
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
su sach » so sach, vu sach
cua tre » cua te, cuu tre, cua triet
va nam » van nam, ha nam, va nay
vi cua » vai cua, di cua

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) OR (su sach)) ky dang xay hoi. lieu va nam ((mua van) OR (mua dan)) hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky dang xay hoi. lieu va nam ((mua van) OR (mua dan)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky dang xay hoi. lieu va nam ((mua van) OR (mua dan)) hanh vi cua tre*.