Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
manh cua » doanh cua, ban cua
su triet » su viet, su tien, ve triet
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va manh » van manh, va danh, va hanh
luc va » duc va, tuc va, loc va
cua su » qua su

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