Perhaps you should try some spelling variations:
danh viet » anh viet, ninh viet, nang viet
cua viet » ca viet, hoa viet, cua vat
danh via » danh gia, danh va, danh giao
thuc va » thuc vat, thuc dan, thuc day
tu sach » thu sach, su sach, tu cach
hieu ve » hieu va, hieu van
te sach » toc sach
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) or (te sach)) ky nang x hoi. hieu ve am thuc va ((danh via) OR (danh viet)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang x hoi. hieu ve am thuc va ((danh via) OR (danh viet)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky nang x hoi. hieu ve am thuc va ((danh via) OR (danh viet)) cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang x hoi. hieu ve am thuc va ((danh via) OR (danh viet)) cua viet*.