Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
hieu va » lieu va, hieu qua
loc ban » lo ban, hoc ban, coc ban
cua tre » cuu tre, cua triet, dua tren
lang xa » lang ha, dang xay, lang van
cac loc » cac lop, cac toc, cac hoc
can ky » van ky, ban ky, tan ky
dan ky » van ky
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: tu ((can ky) or (dan ky)) lang xa hoi. hieu va cac loc ban thanh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((can ky) OR (dan ky)) lang xa hoi. hieu va cac loc ban thanh vi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu ((can ky) or (dan ky)) lang xa hoi. hieu va cac loc ban thanh vi ((cua tre) or (cua te))*.