Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
cua viet » cua vat, cua dieu, va viet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va dinh » van dinh, va kinh, va tinh
dinh di » dinh du, dinh vi, danh di
ca viet » va viet, co viet, san viet
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va

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 y nang xa hoi. hieu ve cham luc va dinh di ((((cua viet) OR (ca viet))) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu ve cham luc va dinh di ((((cua viet) OR (ca viet))) OR (hoa viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu ve cham luc va dinh di ((((cua viet) OR (ca viet))) or (hoa viet))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu ve cham luc va dinh di ((((cua viet) OR (ca viet))) or (hoa viet))*.