Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
va danh » va dinh, va dan, va hanh
va kinh » va tinh, qua kinh
sach v » sach va, sach 2, sach vay
di hoa » dai hoa, doi hoa, do hoa

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