Perhaps you should try some spelling variations:
loc ban » lo ban, coc ban, hoc bang
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, hieu van
hoc ban » hoc bang, hoc dan, hoc bai
di cua » dai cua, doi cua, de cua
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((nang xa) OR (lang xa)) hoi. hieu ve cac ((loc ban) OR (hoc ban)) hanh di cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((nang xa) or (lang xa)) hoi. hieu ve cac ((loc ban) OR (hoc ban)) hanh di cua te~".
• Adding a wildcard symbol may retrieve word variants: te sac ky ((nang xa) or (lang xa)) hoi. hieu ve cac ((loc ban) OR (hoc ban)) hanh di cua te*.