Perhaps you should try some spelling variations:
thanh hoi » thanh hoai, thanh hoa, thanh hai
hoc sach » hoc sinh, hoc cac, hoc anh
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va
thuc va » thuc vat, thuc dan, thuc day
hoi cua » hoi chuc
y xang » ty xang
tuc va » truc va, tuc xa, duc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach y xang xa hoi. ((hieu va) OR (hieu qua)) phat ((tuc va) or (thuc va)) thanh hoi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y xang xa hoi. ((hieu va) OR (hieu qua)) phat ((tuc va) OR (thuc va)) thanh hoi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach y xang xa hoi. ((hieu va) OR (hieu qua)) phat ((tuc va) or (thuc va)) thanh hoi cua te".
• Adding a wildcard symbol may retrieve word variants: hoc sach y xang xa hoi. ((hieu va) OR (hieu qua)) phat ((tuc va) or (thuc va)) thanh hoi cua te*.