Perhaps you should try some spelling variations:
sach tay » sach hay, sach nay, sach tai
xach tay » canh tay
doan vi » doan va, don vi, doan thi
hieu va » lieu va, hieu qua
cac thu » cach thuc, cac thoi
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
thu va » thuc va, thue va, tu va
dan va » doan va, dan ca, ban va

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 tay) OR (xach tay)) lang xa hoi. hieu va cac thu va ((dan va) or (doan vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tay) OR (xach tay)) lang xa hoi. hieu va cac thu va ((dan va) OR (doan vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tay) OR (xach tay)) lang xa hoi. hieu va cac thu va ((dan va) or (doan vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tay) OR (xach tay)) lang xa hoi. hieu va cac thu va ((dan va) or (doan vi)) cua tre*.