Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
lam chat » luan chat, cao chat, ly chat
chat tre » chay tren, chat tai, cho tre
nang xa » nang x, lang xa, nang ma
hieu tu » chieu tu, hieu tuc, hien tu
va danh » va dinh, va dan, va hanh
y nang » ky nang, ly nang, v nang
tu am » tu nam, tu lam, tu cam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach y nang xa hoi. hieu tu am thuc ((((van hanh) OR (ban hanh))) OR (va danh)) lam chat tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach y nang xa hoi. hieu tu am thuc ((((van hanh) OR (ban hanh))) or (va danh)) lam chat tre~".
• Adding a wildcard symbol may retrieve word variants: hoc sach y nang xa hoi. hieu tu am thuc ((((van hanh) OR (ban hanh))) or (va danh)) lam chat tre*.