Perhaps you should try some spelling variations:
nghe nam » nghe lam, nghiep nam, nghe nano
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
xa danh » va danh, dia danh, nam danh
sai cua » hai cua, lai cua, bai cua
he nam » ha nam
thu xa » thu xac, thu ha, thu xe

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

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