Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
so sach » so sanh, bo sach, co sach
va hanh » van hanh, va thanh, ban hanh
ky sang » ky nang, ky dang, ky tang
sang ma » tang ma, nang ma, sang tao
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
sach ky » sac ky, sach y, sach ty
va danh » va dinh, va dan, dia danh
di cua » doi cua, de cua, do cua
ma hai » ta hai, va hai, xa hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky sang ma hai. hieu ve cham luc ((va danh) or (va hanh)) ((di cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky sang ma hai. hieu ve cham luc ((va danh) OR (va hanh)) ((di cua) OR (dai cua)) te.
• Adding a wildcard symbol may retrieve word variants: so sach ky sang ma hai. hieu ve cham luc ((va danh) or (va hanh)) ((di cua) or (dai cua)) te*.