Perhaps you should try some spelling variations:
cua quoc » cua nuoc, cua thuoc
quoc ban » quoc bao, quoc lan, quoc quan
ban hanh » ban hang
ky tang » ky nang, kho tang, ky trong
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
tu sai » tu bai, tu san, tu cai
va cua » va chua, via cua, ca cua
vi cua » vai cua, di 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 sai ((ky tang) or (ky dang)) ((ma hoa) or (xa hoi)). hieu va cua quoc ban hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ((ky tang) OR (ky dang)) ((ma hoa) OR (xa hoi)). hieu va cua quoc ban hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu sai ((ky tang) or (ky dang)) ((ma hoa) or (xa hoi)). hieu va cua quoc ban hanh vi cua te*.