Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
cham luc » cham soc, nhan luc, cham cuu
va tinh » may tinh
va dinh » van dinh, va kinh, vu dinh
sach ha » sach nha, sach han, sach xa
hieu tu » chieu tu, hieu tuc, hien tu
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
tu cham » toc cham, thi cham
di cua » dai cua, doi cua, de 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 ha ((nang xa) or (nang ma)) hoi. hieu tu cham luc ((va dinh) OR (va tinh)) di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ha ((nang xa) OR (nang ma)) hoi. hieu tu cham luc ((va dinh) OR (va tinh)) di cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ha ((nang xa) or (nang ma)) hoi. hieu tu cham luc ((va dinh) OR (va tinh)) di cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ha ((nang xa) or (nang ma)) hoi. hieu tu cham luc ((va dinh) OR (va tinh)) di cua viet*.