Perhaps you should try some spelling variations:
thanh nghi » thanh nguoi, thanh ngu, hanh nghe
nam thuc » nam thuoc, am thuc, nam thu
nghi cuu » nghi cua, nghien cuu, nghi cuoc
da thanh » dao thanh, dat thanh, dam thanh
su sach » so sach, vu sach
cam thu » nam thu, cac thu, ca thu
hieu ve » hieu va, hieu van
ty nang » ty xang, ty hang, ly nang
cuu tre » cua tre, cau tren, cau treo
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 ((ty nang) OR (ky nang)) x hoi. hieu ve ((cam thu) or (nam thuc)) da thanh nghi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ky nang)) x hoi. hieu ve ((cam thu) OR (nam thuc)) da thanh nghi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ky nang)) x hoi. hieu ve ((cam thu) or (nam thuc)) da thanh nghi cuu tre*".