Perhaps you should try some spelling variations:
cua quoc » cua nuoc, cua thuoc
mai khoi » mai khoa, tai khoa, cac khoi
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
lai hoi » dai hoi, lai hoa, lai roi
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac
vi cua » vai cua, di cua
ve cam » ve cham, va cam, ve cai

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 khoi) or (lai hoi)). hieu ((ve cam) OR (ve cac)) xuc van hanh vi cua quoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((mai khoi) OR (lai hoi)). hieu ((ve cam) OR (ve cac)) xuc van hanh vi cua quoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((mai khoi) or (lai hoi)). hieu ((ve cam) OR (ve cac)) xuc van hanh vi cua quoc".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((mai khoi) or (lai hoi)). hieu ((ve cam) OR (ve cac)) xuc van hanh vi cua quoc*.