Perhaps you should try some spelling variations:
cham luu » cham cuu, chat lua, phap luu
van doan » van doanh, van toan, van hoan
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
luu van » cuu van, luan van, luu hanh
van cua » vang cua, dan cua, nan cua
ban cua » ban quan
y nang » ky nang, ly nang, v nang
x hoi » o 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: tu sach y nang ((x hoi) or (xa hoi)). hieu ve cham luu van doan ((van cua) OR (ban cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((x hoi) OR (xa hoi)). hieu ve cham luu van doan ((van cua) OR (ban cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((x hoi) or (xa hoi)). hieu ve cham luu van doan ((van cua) OR (ban cua)) tre*".