Perhaps you should try some spelling variations:
ban chinh » lan chinh, van chinh, hoan chinh
nang ma » tang ma, sang ma, nang cao
ve cham » va cham, ve chat, vu cham
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cac, 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 sac ky nang ma hoi. hieu ((ve cam) or (ve cham)) cuc ((ban chinh) OR (hanh chinh)) tri cua 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) OR (hanh chinh)) tri cua 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) OR (hanh chinh)) tri cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ma hoi. hieu ((ve cam) or (ve cham)) cuc ((ban chinh) OR (hanh chinh)) tri cua tre*.