Perhaps you should try some spelling variations:
danh sai » dung sai, danh bat, danh dau
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
danh va » doanh va, hanh va, anh va
y nang » ly nang, v nang, may nang
x hoi » xa hoi, o hoi, x ho
ve am » va am

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