Perhaps you should try some spelling variations:
sach nuoc » sach duoc, cac nuoc, dich nuoc
hieu viec » nhieu viec, hieu ve, sieu viet
bach tuoc » sach duoc
tu sach » thu sach, su sach, te sach
lai cua » dai cua, hai cua, lai chau
va danh » va dinh, va dan, dia danh
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va thanh, ban hanh
sach ky » sac ky, sach y, sach ty
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 viec ((bach tuoc) or (sach nuoc)) ((va hanh) OR (va danh)) lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu viec ((bach tuoc) OR (sach nuoc)) ((va hanh) OR (va danh)) lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang x hoi. hieu viec ((bach tuoc) or (sach nuoc)) ((va hanh) OR (va danh)) lai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu viec ((bach tuoc) or (sach nuoc)) ((va hanh) OR (va danh)) lai cua tre*.