Perhaps you should try some spelling variations:
dau than » dau thau, dan than, dau thay
than cuu » than cua, than cui, thanh luu
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
van cac » van hac, van bac, dan cac
van cau » van dau, van hau, van chat
cuu tre » cua tre, cau tren, cau treo
va dau » va dao
x hoi » xa hoi, o hoi, x ho

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 ly nang x hoi. hieu ((van cac) or (van cau)) nuoc va dau than cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang x hoi. hieu ((van cac) OR (van cau)) nuoc va dau than cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ly nang x hoi. hieu ((van cac) or (van cau)) nuoc va dau than cuu tre*.