Perhaps you should try some spelling variations:
thuc day » thuc dan, thuc vat
day danh » day manh, dai danh, dao danh
nang mai » nang ma, nang tai, lang mai
nam thuc » nam thuoc, am thuc, nam thu
co viet » so viet, hoc viet, hoa viet
va viet » hoa viet, san viet, mai viet
danh di » danh du, xanh di, danh dien
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ve nam » he nam, va nam, le nam
o viet » so viet, hoc viet

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 ky nang mai hoi. hieu ve nam thuc day danh di ((va viet) or (((co viet) OR (o viet))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang mai hoi. hieu ve nam thuc day danh di ((va viet) OR (((co viet) OR (o viet)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang mai hoi. hieu ve nam thuc day danh di ((va viet) or (((co viet) OR (o viet))))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang mai hoi. hieu ve nam thuc day danh di ((va viet) or (((co viet) OR (o viet))))*.