Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
su sach » so sach, vu sach
danh di » danh du, xanh di, danh dien
danh vi » hanh vi, dinh vi, danh va
sach ty » sach y, sach tu, sach thu
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
lap lai » lap tai, lay lai, lam lai
lap hai » lap tai, lap hoat, lanh hai
ty dang » ty xang, ky dang, ty hang
luc va » duc va, tuc va, loc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty dang ((lap hai) OR (lap lai)). hieu ve cham luc va ((danh vi) or (danh di)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty dang ((lap hai) OR (lap lai)). hieu ve cham luc va ((danh vi) OR (danh di)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty dang ((lap hai) OR (lap lai)). hieu ve cham luc va ((danh vi) or (danh di)) cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ty dang ((lap hai) OR (lap lai)). hieu ve cham luc va ((danh vi) or (danh di)) cua te*.