Perhaps you should try some spelling variations:
chet duoc » che duoc, cho duoc, che quoc
thanh van » thanh san, thanh toan, thanh phan
ban thanh » ban hanh, ban hang
va triet » va trien, ve triet, cua triet
duoc ban » duc ban, quoc ban, buoc ban
co sach » bo sach, cuon sach, hoc sach
ve chet » ve chat, ve che, se chet
hieu ve » hieu va, hieu van
te sach » toc sach
x hoi » xa hoi, o hoi, x ho
thiet » thieu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((co sach) or (te sach)) ky nang x hoi. hieu ve chet duoc ban thanh van ((va triet) OR (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((co sach) OR (te sach)) ky nang x hoi. hieu ve chet duoc ban thanh van ((va triet) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((co sach) or (te sach)) ky nang x hoi. hieu ve chet duoc ban thanh van ((va triet) OR (va thiet))".
• Adding a wildcard symbol may retrieve word variants: ((co sach) or (te sach)) ky nang x hoi. hieu ve chet duoc ban thanh van ((va triet) OR (va thiet))*.