Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
thanh van » thanh san, thanh toan, thanh nhan
cam thuc » am thuc, nam thuc, cam thu
thuc ban » thuoc ban, thuc dan, thu ban
cua tre » cua te, cuu tre, cua triet
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
so sac » so dac
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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: ((so sac) OR (so sach)) ky nang x hoi. hieu va cam thuc ban ((thanh van) OR (thanh phan)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sac) or (so sach)) ky nang x hoi. hieu va cam thuc ban ((thanh van) OR (thanh phan)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((so sac) or (so sach)) ky nang x hoi. hieu va cam thuc ban ((thanh van) OR (thanh phan)) cua tre*.