Perhaps you should try some spelling variations:
thanh di » thanh doi, thanh de, thanh do
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
xuc ban » duc ban, quoc ban, xuat ban
cuc ban » cua ban, cac ban, cuu ban
van lam » van nam
ky lang » ky dang, ky tang, tay lang
di cua » dai cua, doi cua, de cua
tu sac » tu sach, tu cac, tu san

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 lang) or (ky nang)) xa hoi. hieu van lam ((xuc ban) OR (cuc ban)) thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky lang) OR (ky nang)) xa hoi. hieu van lam ((xuc ban) OR (cuc ban)) thanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky lang) or (ky nang)) xa hoi. hieu van lam ((xuc ban) OR (cuc ban)) thanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky lang) or (ky nang)) xa hoi. hieu van lam ((xuc ban) OR (cuc ban)) thanh di cua tre*.