Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua dieu
thu sach » thuat sach, thuoc sach, thu hoach
cham luc » cham soc, nhan luc, cham cuu
tu sach » su sach, te sach, tu cach
vu cham » va cham, vu kham, tu cham
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
hieu vu » hieu va, hieu ve, hieu su
nang xa » nang x, lang xa, nang ma
ha nang » kha nang, hoa nang, da nang
luc va » duc va, tuc va, loc va

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