Perhaps you should try some spelling variations:
danh sai » dung sai, danh bat, danh dau
hieu he » hieu ve, hiem he, hieu le
thu nam » thu nhap, thu nhat, thu ngan
tu sach » thu sach, su sach, te sach
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
cuu tre » cua tre, cau tren, cau treo
sach v » sach va, sach y, sach 2
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 ((nang ma) or (sang ma)) hoi. hieu he nam ((thu nam) or (tu nam)) danh sai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v ((nang ma) OR (sang ma)) hoi. hieu he nam ((thu nam) OR (tu nam)) danh sai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach v ((nang ma) or (sang ma)) hoi. hieu he nam ((thu nam) or (tu nam)) danh sai cuu tre*.