Perhaps you should try some spelling variations:
thanh le » thanh ve, thanh de, thanh liem
thinh le » trinh ly
sach tu » sach thu, cach tu, sach uu
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
sach ty » sach y, sach thu, xach tay
cao duc » dao duc, cao suc, giao duc
duc ban » duc tan, duc van, dua ban
ve cao » va cao, ve bao, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (sach tu)) lang xa hoi. hieu ve cao duc ban ((thanh le) or (thinh le)) cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) lang xa hoi. hieu ve cao duc ban ((thanh le) OR (thinh le)) cua vat.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach tu)) lang xa hoi. hieu ve cao duc ban ((thanh le) or (thinh le)) cua vat*.