Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
duoc ban » duc ban, buoc ban, duoc bat
quoc ban » quoc bao, quoc lan, quoc quan
nang xa » nang x, lang xa, nang ma
van lam » van nam
van cua » vang cua, dan cua, nan cua
ban cua » ban quan
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang xa hoi. hieu van lam ((duoc ban) or (quoc ban)) thanh ((van cua) OR (ban cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. hieu van lam ((duoc ban) OR (quoc ban)) thanh ((van cua) OR (ban cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. hieu van lam ((duoc ban) or (quoc ban)) thanh ((van cua) OR (ban cua)) tre*".