Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
te sach » toc sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
tham so » ham so, tham do, than so
vai cua » dai cua, hai cua, lai cua
so ban » sao ban, so bang, co ban
cua te » cua tu
x hoi » xa hoi, o hoi, 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: te sach ly nang ((x hoi) or (x ho)). hieu van tham so ban thanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang ((x hoi) OR (x ho)). hieu van tham so ban thanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: te sach ly nang ((x hoi) or (x ho)). hieu van tham so ban thanh vai cua te*.