Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
sach ty » sach tu, sach thu, xach tay
hieu va » lieu va, hieu qua
cao duc » dao duc, cao suc, giao duc
chua te » chua tu, chua xe, chuan ted
va cao » va cac, va co, va dao
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: thu ((sach ty) or (sach y)) nang x hoi. hieu va cao duc va thanh va ((chua te) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ty) OR (sach y)) nang x hoi. hieu va cao duc va thanh va ((chua te) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ty) or (sach y)) nang x hoi. hieu va cao duc va thanh va ((chua te) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ty) or (sach y)) nang x hoi. hieu va cao duc va thanh va ((chua te) OR (cua te))*.