Perhaps you should try some spelling variations:
bang thanh » ban thanh, dang thanh, tang thanh
bang hinh » hang chinh, tung hinh
ky mang » ky nang, ke mang, ky dang
may hoi » may thoi, tay hoi, mai hoi
vu cham » va cham, vu kham, tu cham
ve cham » va cham, ve chat, ve chim
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky mang may hoi. hieu ((ve cham) OR (vu cham)) so ((bang thanh) OR (bang hinh)) vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky mang may hoi. hieu ((ve cham) OR (vu cham)) so ((bang thanh) or (bang hinh)) vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu cac ky mang may hoi. hieu ((ve cham) OR (vu cham)) so ((bang thanh) or (bang hinh)) vi cua tre*.