Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
thanh va » thanh van, hanh va, thanh ha
thanh vi » hanh vi, thanh ve, nhanh vi
su sach » so sach, vu sach
luc van » luoc van, luu van, duc van
ve cham » va cham, ve chat, vu cham
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
lai hoi » lai hoa, lai roi, mai hoi
dai hoi » dai hoc, dai hai, dai moi
ty nang » ky nang, ty xang, ty hang
cua duc » cua tuc, cua nuoc, cua quoc

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 nang ((dai hoi) or (lai hoi)). hieu ve cham luc van ((thanh vi) or (thanh va)) cua duc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ((dai hoi) OR (lai hoi)). hieu ve cham luc van ((thanh vi) OR (thanh va)) cua duc.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ((dai hoi) or (lai hoi)). hieu ve cham luc van ((thanh vi) or (thanh va)) cua duc*.