Perhaps you should try some spelling variations:
tu cach » tu cac
te sach » toc sach
cao hoi » cau hoi, co hoi, cao hoc
va chat » van chat, cao chat, hoa chat
va danh » va dinh, va dan, va hanh
danh ca » dan ca, doanh cua, danh cho
cua tre » cua te, cuu tre, cua triet
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (te sach)) ky nang cao hoi. hieu ((va chat) OR (va phat)) duc va danh ca cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky nang cao hoi. hieu ((va chat) OR (va phat)) duc va danh ca cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (te sach)) ky nang cao hoi. hieu ((va chat) OR (va phat)) duc va danh ca cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky nang cao hoi. hieu ((va chat) OR (va phat)) duc va danh ca cua tre*.