Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach vu » sach va, sach tu, sach uu
vu sang » vua sang, vu dang, vu san
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
va cham » va chat, va tham
luc van » luoc van, luu van, duc van
hanh ky » hanh kem
ma hoi » xa hoi, ma hoa, me 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 vu sang ((ma hoi) or (mai hoi)). hieu va cham luc van hanh ky su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach vu sang ((ma hoi) OR (mai hoi)). hieu va cham luc van hanh ky su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach vu sang ((ma hoi) or (mai hoi)). hieu va cham luc van hanh ky su triet*.