Perhaps you should try some spelling variations:
nam danh » nam dan
sai cua » dai cua, hai cua, lai cua
hieu he » hieu ve, hiem he, hieu le
sang ma » tang ma, nang ma, sang tao
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach vay
he nam » ha nam, nghe nam
sach 2 » sach y

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 v) OR (sach 2)) sang ma hoa. hieu he nam thu ((nam danh) or (nam dinh)) sai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach v) OR (sach 2)) sang ma hoa. hieu he nam thu ((nam danh) OR (nam dinh)) sai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach v) OR (sach 2)) sang ma hoa. hieu he nam thu ((nam danh) or (nam dinh)) sai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach v) OR (sach 2)) sang ma hoa. hieu he nam thu ((nam danh) or (nam dinh)) sai cua tre*.