Perhaps you should try some spelling variations:
hoc nhanh » hoc nganh, hoc phan
hanh dai » hanh tai, hanh dao, vanh dai
va hanh » van hanh, va thanh, va danh
cac bac » cac bai, cac ban, cac cach
cac dac » cac dan, cac dai, cac tac
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
van hoi » van hoa, van hoc, van hoe
ky dang » ky nang, ky danh
ky tang » ky nang, kho tang, ky trong

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 nhanh ((ky tang) OR (ky dang)) van hoi. hieu ve ((cac dac) OR (cac bac)) va hanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc nhanh ((ky tang) or (ky dang)) van hoi. hieu ve ((cac dac) OR (cac bac)) va hanh dai cua tre~".
• Adding a wildcard symbol may retrieve word variants: hoc nhanh ((ky tang) or (ky dang)) van hoi. hieu ve ((cac dac) OR (cac bac)) va hanh dai cua tre*.