Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
van cam » van nam, van lam, van cau
va danh » va dinh, va dan, va hanh
kien » bien, vien, tien

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 dang xay hoi. hieu van cam xuc ((va danh) or (van hanh)) vi ((su triet) or (su kien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xay hoi. hieu van cam xuc ((va danh) OR (van hanh)) vi ((su triet) OR (su kien)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xay hoi. hieu van cam xuc ((va danh) or (van hanh)) vi ((su triet) or (su kien))*.