Perhaps you should try some spelling variations:
vien dai » hien dai
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
co sach » bo sach, cuon sach, hoc sach
vai cuu » vai cua
vuc van » duc van, luc van, thuc van
va cham » va chat, va tham
sach ty » sach y, sach tu, sach thu
ty sang » ty xang, ty hang, duy sang
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ty sang ((ma hoi) or (xa hoi)). hieu ((va cham) or (vien dai)) vuc van hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ty sang ((ma hoi) OR (xa hoi)). hieu ((va cham) OR (vien dai)) vuc van hanh vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: co sach ty sang ((ma hoi) or (xa hoi)). hieu ((va cham) or (vien dai)) vuc van hanh vai cuu tre*.