Perhaps you should try some spelling variations:
mang xa » mang may, dang xay, mang cua
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cac hoc » cach hoc, cac hop, bac hoc
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
di cua » dai cua, doi cua, de cua
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 sac ky ((mang xa) or (lang xa)) hoi. hieu va cac hoc va hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((mang xa) OR (lang xa)) hoi. hieu va cac hoc va hanh di cua te.
• Adding a wildcard symbol may retrieve word variants: te sac ky ((mang xa) or (lang xa)) hoi. hieu va cac hoc va hanh di cua te*.