Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
lang van » dang van, tang van, hoang van
thanh vi » hanh vi, thanh va, thanh ve
hieu va » lieu va, hieu qua
duc ban » duc tan, duc van, dua ban
lang xa » lang ha, dang xay
cua tre » cua te, cuu tre, cua triet
cao duc » dao duc, cao suc, giao duc
tu sai » tu bai, tu san, tu cai
va cao » va cac, va co, va dao
sai ky » sac ky
cua tu » cua tuc, cua su, cua cu

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

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