Perhaps you should try some spelling variations:
quoc quan » qua quan, luc quan, hoc quan
hieu van » hieu va, thien van, lieu va
quoc ban » quoc bao, quoc lan, quoc binh
van han » van hanh, van phan, van nhan
benh vi » benh va, benh ve, benh li
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu van han ((quoc ban) OR (quoc quan)) benh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang x hoi. hieu van han ((quoc ban) OR (quoc quan)) benh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang x hoi. hieu van han ((quoc ban) OR (quoc quan)) benh vi cua tre*.