Perhaps you should try some spelling variations:
hieu cua » hieu qua, dieu cua, bieu cua
va thanh » gia thanh, ban thanh, va tinh
thanh de » hanh de, thanh ve, thanh do
sach ky » sach y, sach ty, sach kem
tang xa » trang xa, tang ma, lang xa
cac tuc » cac toc, cac tu, cac tac
cuu tre » cua tre, cau tren, cau treo
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa
de cuu » 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: so ((sach ky) OR (sac ky)) tang xa hoi. hieu cua cac tuc va thanh de cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ky) OR (sac ky)) tang xa hoi. hieu cua cac tuc va thanh de cuu tre".
• Adding a wildcard symbol may retrieve word variants: so ((sach ky) OR (sac ky)) tang xa hoi. hieu cua cac tuc va thanh de cuu tre*.