Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
van chay » van chat, san chay, toan chay
tu sach » thu sach, su sach, te sach
ty nang » ty xang, ty hang, ly nang
dua ban » dia ban, cua ban, qua ban
vai cua » dai cua, hai cua, lai cua
cua te » cua tu

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 ((ty nang) or (ky nang)) ma hoa. hieu van chay dua ban thanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ky nang)) ma hoa. hieu van chay dua ban thanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ky nang)) ma hoa. hieu van chay dua ban thanh vai cua te*.