Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
hanh cat » hanh cac, hanh luat, nhanh cay
su triet » su viet, su tien, ve triet
su sach » vu sach
so sach » so sanh, bo sach, co sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va cham » va chat, va tham
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va
cat su » cao su, dat su, sat su

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) or (so sach)) y nang ma hoi. hieu va cham luc va hanh cat su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y nang ma hoi. hieu va cham luc va hanh cat su triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) y nang ma hoi. hieu va cham luc va hanh cat su triet*.