Perhaps you should try some spelling variations:
so sanh » do sanh
sanh ty » sach ty, canh tay
xang xa » mang xa, ang xa, dang xay
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cac luc » cau luc, coc luc, cac nuoc
va hanh » van hanh, va thanh, va danh
hanh tu » anh tu, danh tu
ve cac » va cac, vien cac
luc va » duc va, tuc va, loc va
tu cua » hu cua, vu cua
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: so sanh ty ((xang xa) or (lang xa)) hoi. hieu ve cac luc va hanh tu cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ty ((xang xa) OR (lang xa)) hoi. hieu ve cac luc va hanh tu cua tu.
• Adding a wildcard symbol may retrieve word variants: so sanh ty ((xang xa) or (lang xa)) hoi. hieu ve cac luc va hanh tu cua tu*.