Perhaps you should try some spelling variations:
cham luc » nhan luc, cham cuu, chat lua
cua viet » ca viet, cua vat, cua dieu
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
dau cua » dai cua, day cua, cau cua
v nang » va nang, vu nang, van nang
sach v » sach va, sach y, sach 2
va dau » va dao

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