Perhaps you should try some spelling variations:
chet duoc » che duoc, cho duoc, che quoc
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
duoc va » nuoc va, duc va, duoc ma
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
ve chet » ve chat, ve che, se chet
x hoi » xa hoi, o hoi, x ho
va va » va van, va vai, va vat

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 (toc sach)) ky nang x hoi. hieu ve chet duoc va thanh ((va va) OR (va vua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (toc sach)) ky nang x hoi. hieu ve chet duoc va thanh ((va va) OR (va vua)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (toc sach)) ky nang x hoi. hieu ve chet duoc va thanh ((va va) OR (va vua)) triet*".