Perhaps you should try some spelling variations:
thanh nghia » thanh nghi, thanh nga, thanh nha
nghia cua » nghiep cua, nghia xa, nghia duy
da thanh » dao thanh, dat thanh, dam thanh
nam thuc » nam thuoc, am thuc, nam tu
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ty nang » ky nang, ty xang, ty hang
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty nang ((x hoi) OR (o hoi)). hieu ve ((nam thuc) or (nam thu)) da thanh nghia cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang ((x hoi) OR (o hoi)). hieu ve ((nam thuc) OR (nam thu)) da thanh nghia cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty nang ((x hoi) OR (o hoi)). hieu ve ((nam thuc) or (nam thu)) da thanh nghia cua tre*".