Perhaps you should try some spelling variations:
van chat » cao chat
hoc sach » hoc sinh, hoc cac, hoc anh
van tham » van thanh, van tuan, van tai
va danh » va dan, va hanh, dia danh
va dinh » van dinh, va kinh, va tinh
sai cua » dai cua, hai cua, lai cua
y nang » ky nang, ly nang, v nang
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: hoc sach y nang x hoi. thien ((van tham) or (van chat)) thuc ((va danh) OR (va dinh)) sai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y nang x hoi. thien ((van tham) OR (van chat)) thuc ((va danh) OR (va dinh)) sai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach y nang x hoi. thien ((van tham) or (van chat)) thuc ((va danh) OR (va dinh)) sai cua te".
• Adding a wildcard symbol may retrieve word variants: hoc sach y nang x hoi. thien ((van tham) or (van chat)) thuc ((va danh) OR (va dinh)) sai cua te*.