Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
thu sach » thuat sach, thuoc sach, thu hoach
hieu van » hieu va, thien van, lieu va
tu sach » su sach, te sach, tu cach
van hac » van hoc, van ha, van hai
hac dac » cac dac, ha dac, nhac dan
dac ban » cac ban, dac san, duc ban
y nang » ky nang, ly nang, v nang
cua te » cua tu
x hoi » o hoi, x ho, 5 hoi

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) or (thu sach)) y nang ((x hoi) or (xa hoi)). hieu van hac dac ban thanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang ((x hoi) OR (xa hoi)). hieu van hac dac ban thanh dai cua te.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang ((x hoi) or (xa hoi)). hieu van hac dac ban thanh dai cua te*.