Perhaps you should try some spelling variations:
chat thuc » thuat thuc, nhan thuc, chat thai
su triet » su viet, su tien, ve triet
va triet » va thiet, va trien, ve triet
dung sai » dung tai, dung va, dung dat
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach y, sach ty
danh di » danh du, xanh di, danh dien
tu sach » thu sach, su sach, te sach
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 va chat thuc va ((dung sai) or (danh di)) ((va triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu va chat thuc va ((dung sai) OR (danh di)) ((va triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu va chat thuc va ((dung sai) or (danh di)) ((va triet) or (su triet))*.