Perhaps you should try some spelling variations:
sach ky » sac ky, sach ty, sach kem
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
luc may » truc may, phuc may
tinh vi » trinh vi, tinh voi, tinh va
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
va coc » va cuoc, va cac, va hoc

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 (sach y)) dang xa hoi. hieu va coc luc may tinh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach ky) OR (sach y)) dang xa hoi. hieu va coc luc may tinh vi ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ky) OR (sach y)) dang xa hoi. hieu va coc luc may tinh vi ((cua tre) or (cuu tre))*".