Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua quoc » cua nuoc, cua thuoc
thanh va » thanh van, hanh va, thanh ha
mai khoi » mai khoa, tai khoa, cac khoi
thu sach » thuat sach, thuoc sach, thu hoach
mai hoi » dai hoi, lai hoi, mai doi
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
tu sach » su sach, te sach, tu cach
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
va cua » va chua, via cua, ca cua

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 ((mai hoi) or (mai khoi)). hieu va cam xuc van thanh va cua quoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang ((mai hoi) OR (mai khoi)). hieu va cam xuc van thanh va cua quoc.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang ((mai hoi) or (mai khoi)). hieu va cam xuc van thanh va cua quoc*.