Perhaps you should try some spelling variations:
danh dai » danh dau, danh di, danh sai
va triet » va thiet, va trien, ve triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
van dam » van nam, van dao, van dau
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
van am » van nam, van lam, van ai
dai va » mai va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang x hoi. hieu ((van am) or (van dam)) thuc va danh dai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x hoi. hieu ((van am) OR (van dam)) thuc va danh dai va triet.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. hieu ((van am) or (van dam)) thuc va danh dai va triet*.