Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
lang van » dang van, tang van, hoang van
thanh vi » hanh vi, thanh va, thanh ve
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay
cua tre » cua te, cuu tre, cua triet
cac duc » cac du, cao duc, cac dac
duc van » duc va, duc tan, duc manh
tu sai » tu bai, tu san, tu cai
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 cac duc van 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 cac duc van 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 cac duc van thanh vi ((cua tre) or (cua tu))*.