Perhaps you should try some spelling variations:
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
cac loc » cac lop, cac toc, cac hoc
nang xa » nang x, nang ma, mang xa
hanh di » hanh vi, hanh de, hang di
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va
loc ban » lo ban, hoc ban, coc ban
te san » te ban, ke san, tu san
di cua » dai cua, doi cua, de cua
san ky » sang ky, van ky, dan 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: te san ky ((nang xa) or (lang xa)) hoi. ((hieu ve) OR (hieu van)) cac loc ban hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ky ((nang xa) OR (lang xa)) hoi. ((hieu ve) OR (hieu van)) cac loc ban hanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te san ky ((nang xa) or (lang xa)) hoi. ((hieu ve) OR (hieu van)) cac loc ban hanh di cua te".
• Adding a wildcard symbol may retrieve word variants: te san ky ((nang xa) or (lang xa)) hoi. ((hieu ve) OR (hieu van)) cac loc ban hanh di cua te*.