Perhaps you should try some spelling variations:
luan hoan » luan van
van phan » van phong, van thanh, luan phan
duoc van » duoc va, duc van, duoc ban
van hanh » van thanh, ban hanh, van anh
hanh tai » thanh tai, hang tai, han tai
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang o » nang co, nang ho, nang ro
cuc te » cua te, cuc thue, cuc tieu
o hoc » co hoc, mo hoc, so hoc

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang o hoc. hieu ((van phan) OR (luan hoan)) duoc van hanh tai cuc te~.
• Adding a wildcard symbol may retrieve word variants: so sach ty nang o hoc. hieu ((van phan) or (luan hoan)) duoc van hanh tai cuc te*.