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, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van bao » van ban, van dao
bao duc » dao duc, bao luc, cao duc
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
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 ty nang x hoi. hieu van bao duc va thanh trinh ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang x hoi. hieu van bao duc va thanh trinh ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: so sach ty nang x hoi. hieu van bao duc va thanh trinh ((cua tre) or (cuu tre))*.