Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
tu cach » tu cac
kinh ba » kinh bac, dinh ba, kinh va
va kinh » va tinh, qua kinh
cao hoi » cau hoi, co hoi, cao hoc
vu sach » vu bach, vu khach
su sach » so sach
luc va » duc va, tuc va, loc va
ba va » bua va, ba vi, ba na
thiet » thieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (((su sach) OR (vu sach)))) ky nang cao hoi. hieu van cham luc va kinh ba va thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (((su sach) OR (vu sach)))) ky nang cao hoi. hieu van cham luc va kinh ba va thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (((su sach) OR (vu sach)))) ky nang cao hoi. hieu van cham luc va kinh ba va thiet".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (((su sach) OR (vu sach)))) ky nang cao hoi. hieu van cham luc va kinh ba va thiet*.