Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
cham luc » cham soc, nhan luc, cham cuu
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
nang xa » lang xa, nang ma, mang xa
va danh » va dinh, va hanh, dia danh
te sach » toc sach
va dan » ca dan, va dao, va dau
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

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