Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van hac » van hoc, van ha, van hai
hac luc » nhan luc, than luc
va hanh » van hanh, va thanh, ban hanh
hanh di » hanh vi, hanh de, hang di
vu dai » vi dai, va dai, vu hai
dai ky » dan ky, dai ly, sai ky
nang o » nang co, nang ho, nang ro
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu dai ky nang o hoi. hieu van hac luc va hanh di cua te~.
• Adding a wildcard symbol may retrieve word variants: vu dai ky nang o hoi. hieu van hac luc va hanh di cua te*.