Perhaps you should try some spelling variations:
thanh nha » thanh nhan, thanh ha, thanh nga
cam thuc » am thuc, cam thu, can thuc
da thanh » dao thanh, dat thanh, dam thanh
nam thuc » nam thuoc, am thuc, nam thu
su sach » vu sach
nha cua » nhat cua, nhan cua, nghia cua
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
tu nang » tru nang, tu nong, tu nano
so sach » so sanh, bo sach, co sach
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: ((su sach) OR (so sach)) tu nang x hoi. hieu ve ((cam thuc) or (nam thuc)) da thanh nha cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) tu nang x hoi. hieu ve ((cam thuc) OR (nam thuc)) da thanh nha cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) tu nang x hoi. hieu ve ((cam thuc) or (nam thuc)) da thanh nha cua tre*".