Perhaps you should try some spelling variations:
thanh trinh » hanh trinh, thanh tinh, thanh binh
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, hoc sach
bao xuc » bao luc, bao thuc
cua tre » cuu tre, cua triet, dua tren
van bao » van ban, van dao
ty nang » ky nang, ty xang, ty hang
co sach » bo sach, cuon sach, hoc sach
xuc va » duc va, tuc va, luc va
cua te » cua tu
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: ((so sach) OR (co sach)) ty nang x hoi. hieu van bao xuc va thanh trinh ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ty nang x hoi. hieu van bao xuc va thanh trinh ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (co sach)) ty nang x hoi. hieu van bao xuc va thanh trinh ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (co sach)) ty nang x hoi. hieu van bao xuc va thanh trinh ((cua tre) or (cua te))*.