Perhaps you should try some spelling variations:
ban doan » ban doanh, ban dan, ban soan
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va tham » van tham, va cham, va thanh
cac ban » cac dan, cac van, can ban
doan vi » doan va, don vi, doan thi
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua

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 lang xa hoi. hieu ((ve cam) or (va tham)) cac ban doan vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky lang xa hoi. hieu ((ve cam) OR (va tham)) cac ban doan vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang xa hoi. hieu ((ve cam) or (va tham)) cac ban doan vi cua tre*.