Perhaps you should try some spelling variations:
thanh trinh » hanh trinh, thanh tinh, thanh binh
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
so sach » so sanh, bo sach, hoc sach
cua tre » cua te, cua triet, dua tren
bao xuc » bao luc, bao thuc
van bao » van ban, van dao
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
co sach » bo sach, cuon sach, hoc sach
cuu tre » cau tren, cau treo
xuc va » duc va, tuc va, luc va

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 xa hoi. hieu van bao xuc va thanh trinh ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ty nang xa hoi. hieu van bao xuc va thanh trinh ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (co sach)) ty nang xa hoi. hieu van bao xuc va thanh trinh ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (co sach)) ty nang xa hoi. hieu van bao xuc va thanh trinh ((cua tre) or (cuu tre))*.