Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
va thanh » gia thanh, va tinh, le thanh
ly nang » ky nang, ly hang, ly vang
sach ly » sach y, sach lo, sach ty
di cua » dai cua, doi cua, de cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho
va co » vo co

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ly nang x hoi. hieu ((va cac) or (va co)) xuc ((va thanh) OR (ban thanh)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ly nang x hoi. hieu ((va cac) OR (va co)) xuc ((va thanh) OR (ban thanh)) di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ly nang x hoi. hieu ((va cac) or (va co)) xuc ((va thanh) OR (ban thanh)) di cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach ly nang x hoi. hieu ((va cac) or (va co)) xuc ((va thanh) OR (ban thanh)) di cua te*.