Perhaps you should try some spelling variations:
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
sach ty » sach tu, sach thu, xach tay
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
duc ban » duc tan, duc van, dua ban
cua tre » cuu tre, cua triet, dua tren
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: su ((sach ty) OR (sach y)) dang xa hoi. hieu va pham duc ban hanh vai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach y)) dang xa hoi. hieu va pham duc ban hanh vai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach y)) dang xa hoi. hieu va pham duc ban hanh vai ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach y)) dang xa hoi. hieu va pham duc ban hanh vai ((cua tre) or (cua te))*.