Perhaps you should try some spelling variations:
dat hang » dat khanh, dat quang, tat thang
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
thu dat » thue dat, tu dat, thu da
hang de » hoang de, hanh de, hang di
y nang » ky nang, ly nang, v nang
ve nam » he nam, va nam, le nam
de cua » le cua, te cua, dieu cua
cua te » cua tu
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: ((so sach) or (vu bach)) y nang ((x ho) or (o hoi)). hieu ve nam thu dat hang de cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (vu bach)) y nang ((x ho) OR (o hoi)). hieu ve nam thu dat hang de cua te.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (vu bach)) y nang ((x ho) or (o hoi)). hieu ve nam thu dat hang de cua te*.