Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
cua viet » ca viet, hoa viet, cua vat
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
luc van » luoc van, luu van, duc van
cua tre » cua te, cuu tre, cua triet
van hac » van hoc, van ha, van hai
hac luc » nhan luc, than luc
nang o » nang co, nang ho, nang ro
tu ban » thu ban, te ban
o lai » o lao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cac) or (tu ban)) ky nang o lai. hieu van hac luc van hanh thai ((cua tre) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (tu ban)) ky nang o lai. hieu van hac luc van hanh thai ((cua tre) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (tu ban)) ky nang o lai. hieu van hac luc van hanh thai ((cua tre) or (cua viet))*.