Perhaps you should try some spelling variations:
cham luc » cham soc, cham cuu, chat lua
nhan luc » nang luc
cua cua » cua chua, qua cua, cua cha
sach ly » sach y, sach lo, sach ty
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
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 ly nang xa hoi. hieu va ((cham luc) or (nhan luc)) va dau ((cua cua) OR (ca cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang xa hoi. hieu va ((cham luc) OR (nhan luc)) va dau ((cua cua) OR (ca cua)) viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly nang xa hoi. hieu va ((cham luc) or (nhan luc)) va dau ((cua cua) OR (ca cua)) viet*".