Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hanh vai » hanh vi, hanh va, hanh tai
thuc dan » thuc hanh, hoc dan, thuc vat
tu sach » thu sach, su sach, te sach
vai cua » dai cua, hai cua, lai cua
thuc va » thuc vat, thuc day
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
y dang » ky dang, 2 dang, _ dang

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 y dang xay hoi. ((hieu ve) or (hieu va)) cau ((thuc va) or (thuc dan)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y dang xay hoi. ((hieu ve) OR (hieu va)) cau ((thuc va) OR (thuc dan)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y dang xay hoi. ((hieu ve) or (hieu va)) cau ((thuc va) or (thuc dan)) hanh vai cua tre*.