Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hanh cua » manh cua, hang cua, hanh sua
cua viet » ca viet, hoa viet, cua dieu
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
ve nam » he nam, va nam, le nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach v nang xa hoi. hieu ve nam thuc va hanh cua ((cua viet) OR (cua vat))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang xa hoi. hieu ve nam thuc va hanh cua ((cua viet) OR (cua vat))".
• Adding a wildcard symbol may retrieve word variants: su sach v nang xa hoi. hieu ve nam thuc va hanh cua ((cua viet) OR (cua vat))*.