Perhaps you should try some spelling variations:
dang xay » dang van, van xay
thuc dan » thuc hanh, hoc dan, thuc vat
thuc va » thuc vat, thuc day
hanh di » hanh vi, hanh de, hang di
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, cua triet
va nam » van nam, ha nam, va nay
di cua » dai cua, doi cua, de 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 ky dang xay hoi. hieu va nam ((thuc va) OR (thuc dan)) hanh di cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xay hoi. hieu va nam ((thuc va) OR (thuc dan)) hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xay hoi. hieu va nam ((thuc va) OR (thuc dan)) hanh di cua tre*.