Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
nam thuc » nam thuoc, am thuc, nam thu
danh vai » danh sai, danh va, doanh van
day danh » day manh, dai danh, dao danh
thuc day » thuc dan, thuc vat
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
hoa doi » hoa dai, hoc doi, xoa doi
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
va nam » van nam, ha nam, va nay

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 ((ky lang) or (ky dang)) hoa doi. hieu va nam thuc day danh vai ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky lang) OR (ky dang)) hoa doi. hieu va nam thuc day danh vai ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky lang) or (ky dang)) hoa doi. hieu va nam thuc day danh vai ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky lang) or (ky dang)) hoa doi. hieu va nam thuc day danh vai ((cua triet) OR (su triet))*.