Perhaps you should try some spelling variations:
ban chinh » lan chinh, van chinh, hanh chinh
cuu tre » cau tren, cau treo
ve cham » va cham, ve chat, vu cham
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cua triet, dua tren
cuc ban » cua ban, cac ban, cuu ban
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cam » ve cac, va cam, ve cai
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang ma hoi. hieu ((ve cam) or (ve cham)) cuc ban chinh tri ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ma hoi. hieu ((ve cam) OR (ve cham)) cuc ban chinh tri ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ma hoi. hieu ((ve cam) or (ve cham)) cuc ban chinh tri ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ma hoi. hieu ((ve cam) or (ve cham)) cuc ban chinh tri ((cua tre) OR (cuu tre))*.