Perhaps you should try some spelling variations:
cham luc » cham soc, cham cuu, chat lua
cua viet » ca viet, hoa viet, cua dieu
nhan luc » nang luc
tu sach » thu sach, su sach, te sach
dan cua » dan ca, ban cua, dai cua
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
sach ly » sach y, sach lo, sach ty
va dan » ca dan, va dao, va dau

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 dan cua ((cua viet) OR (cua vat))~.
• 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 dan cua ((cua viet) OR (cua vat))*.
• 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 dan cua ((cua viet) OR (cua vat))*".