Perhaps you should try some spelling variations:
cham luc » nhan luc, cham cuu, chat lua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cua cua » cua chua, qua cua, cua cha
va dau » va dao
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. hieu ve ((cham luc) or (cham soc)) va dau ((cua cua) OR (ca cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu ve ((cham luc) OR (cham soc)) va dau ((cua cua) OR (ca cua)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu ve ((cham luc) or (cham soc)) va dau ((cua cua) OR (ca cua)) viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ve ((cham luc) or (cham soc)) va dau ((cua cua) OR (ca cua)) viet*.