Perhaps you should try some spelling variations:
danh vai » danh sai, danh va, doanh van
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van dau » van dao, phan dau
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
van am » van nam, van lam, van dam
vai va » mai va, dai va, hai 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: tu sach ky nang x hoi. hieu ((van am) or (van dau)) thuc va danh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu ((van am) OR (van dau)) thuc va danh vai va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu ((van am) or (van dau)) thuc va danh vai va triet*.