Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
thu sach » tu sach, thuat sach, thuoc sach
doi nang » dai nang, hoi nang, voi nang
sach doi » sach hoi, sach moi, sach dao
vai cua » dai cua, hai cua, lai cua
duc ban » duc tan, duc van, dua ban
cua te » cua tu
va cam » va cham, va cao, va cai
va co » vo co
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: thu sach doi nang x hoi. hieu ((((va cam) OR (va cac))) or (va co)) duc ban thanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach doi nang x hoi. hieu ((((va cam) OR (va cac))) OR (va co)) duc ban thanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach doi nang x hoi. hieu ((((va cam) OR (va cac))) or (va co)) duc ban thanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach doi nang x hoi. hieu ((((va cam) OR (va cac))) or (va co)) duc ban thanh vai cua te*.