Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
va chua » vua chua, ca chua, va chu
tinh va » tich va, trinh van, trinh vat
va tinh » may tinh
tu cham » toc cham, thi cham
hieu tu » chieu tu, hieu tuc, hien tu
chua te » cua te, chua tu, chua xe
sach ky » sac ky, sach ty, sach kem
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) or (sach y)) nang ((x hoi) OR (o hoi)). hieu tu cham duc va tinh va chua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang ((x hoi) OR (o hoi)). hieu tu cham duc va tinh va chua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) nang ((x hoi) OR (o hoi)). hieu tu cham duc va tinh va chua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) nang ((x hoi) OR (o hoi)). hieu tu cham duc va tinh va chua te*.