Perhaps you should try some spelling variations:
danh sai » dung sai, danh bat, danh dau
sai cua » dai cua, hai cua, lai cua
thu nam » thu nhap, thu nhat, thu ngan
hieu he » hieu ve, hiem he, hieu le
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
sach v » sach va, sach 2, sach vay
he nam » ha nam, nghe nam
tu nam » su nam

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