Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
xach tay » canh tay
thuc dan » thuc hanh, hoc dan, thuc vat
thuc ban » thuoc ban, thu ban, thuc van
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
sach tu » sach thu, cach tu, sach ty
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((xach tay) or (sach tu)) lang xa hoi. hieu va cam ((thuc ban) OR (thuc dan)) thanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((xach tay) OR (sach tu)) lang xa hoi. hieu va cam ((thuc ban) OR (thuc dan)) thanh doi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((xach tay) or (sach tu)) lang xa hoi. hieu va cam ((thuc ban) OR (thuc dan)) thanh doi cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((xach tay) or (sach tu)) lang xa hoi. hieu va cam ((thuc ban) OR (thuc dan)) thanh doi cua tre*.