Perhaps you should try some spelling variations:
van doan » van doanh, van toan, van hoan
doan van » doan va, hoang van, luan van
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, ve chim
vu cham » va cham, vu kham, tu cham
van cuu » van cau, van chu, van cu
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
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: tu sach y nang x hoi. hieu ((ve cham) or (vu cham)) cuu van doan van cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu ((ve cham) OR (vu cham)) cuu van doan van cuu tre*.