Perhaps you should try some spelling variations:
nghe san » nghe dan, nghe sinh, nghe va
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
xa danh » dia danh, nam danh, van danh
va danh » va dinh, va dan, va hanh
sai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang ma hoa. hieu ((ha nam) or (nghe san)) thu ((xa danh) OR (va danh)) sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ma hoa. hieu ((ha nam) OR (nghe san)) thu ((xa danh) OR (va danh)) sai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ma hoa. hieu ((ha nam) or (nghe san)) thu ((xa danh) OR (va danh)) sai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ma hoa. hieu ((ha nam) or (nghe san)) thu ((xa danh) OR (va danh)) sai cua tre*.