Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh thai » nhanh thai, hinh thai, hanh tai
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, dua tren
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 triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cac) OR (tu ban)) ky nang o lai. hieu van hac luc van hanh thai ((cua tre) OR (cua triet))".
• 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 triet))*.