Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cua quoc » cua nuoc, cua thuoc
thanh vi » hanh vi, thanh va, thanh ve
cua duc » cua tuc, cua nuoc
xuc ban » duc ban, cuc ban, quoc ban
tu sach » thu sach, su sach, te sach
mai hoi » mai khoi, dai hoi, mai doi
lai hoi » dai hoi, lai hoa, lai roi
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam

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