Perhaps you should try some spelling variations:
cham luc » nhan luc, cham cuu, chat lua
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
y nang » ky nang, ly nang, v nang
va dau » va dao
dau ca » dau cay, dau cua, dan ca
ca hoa » cau hoa, cam hoa, cai hoa

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 y nang xa hoi. hieu vu ((cham luc) OR (cham soc)) va dau ca hoa viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu vu ((cham luc) OR (cham soc)) va dau ca hoa viet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu vu ((cham luc) OR (cham soc)) va dau ca hoa viet*.