Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
cua viet » ca viet, hoa viet, cua vat
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
chuc va » thuc va, thuc vat
vu pham » su pham, vi pham, vu kham
hieu vu » hieu va, hieu ve, hieu su
sach va » sach ha, sach dao, sach nha
nang xa » lang xa, nang ma, mang xa
sach xa » sach dao, sach nha, sach bai
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: tu ((sach va) OR (sach xa)) ((nang xa) or (nang x)) hoi. hieu vu pham chuc va danh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach va) OR (sach xa)) ((nang xa) OR (nang x)) hoi. hieu vu pham chuc va danh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach va) OR (sach xa)) ((nang xa) or (nang x)) hoi. hieu vu pham chuc va danh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach va) OR (sach xa)) ((nang xa) or (nang x)) hoi. hieu vu pham chuc va danh vi cua viet*.