Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
cham luc » cham soc, nhan luc, cham cuu
su triet » su viet, su tien, ve triet
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
luc va » duc va, tuc va, loc va
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ky) or (sach ty)) nang ((x hoi) OR (o hoi)). lieu va cham luc va hanh lai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ky) OR (sach ty)) nang ((x hoi) OR (o hoi)). lieu va cham luc va hanh lai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ky) or (sach ty)) nang ((x hoi) OR (o hoi)). lieu va cham luc va hanh lai su triet".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ky) or (sach ty)) nang ((x hoi) OR (o hoi)). lieu va cham luc va hanh lai su triet*.