Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
ban hanh » ban hang
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
vai cua » dai cua, hai cua, lai cua
va chat » van chat, va phat, cao chat
sach ky » sac ky, sach y, sach ty
ve chat » van chat
cau hoa » cau hoi
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang cau hoa. hieu ((ve chat) OR (va chat)) xuc ((va thanh) or (ban hanh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang cau hoa. hieu ((ve chat) OR (va chat)) xuc ((va thanh) OR (ban hanh)) vai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang cau hoa. hieu ((ve chat) OR (va chat)) xuc ((va thanh) or (ban hanh)) vai cua tre*".