Perhaps you should try some spelling variations:
doan vai » doan va, doan van, doan hai
vai cuu » vai cua
va doan » va doanh, van doan, va dan
cach tu » cach thuc
sach ky » sac ky, sach y, sach kem
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach ty)) dang xa hoi. hieu ve ((cach tu) OR (cac du)) va doan vai cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) OR (sach ty)) dang xa hoi. hieu ve ((cach tu) or (cac du)) va doan vai cuu tre~".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) OR (sach ty)) dang xa hoi. hieu ve ((cach tu) or (cac du)) va doan vai cuu tre*.