Perhaps you should try some spelling variations:
doan thi » dan thi, doanh tai, hoang thi
cua tre » cua te, cuu tre, cua triet
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
doan vi » doan va, don vi, doan van
tu sac » tu sach, tu cac, tu san
dan va » doan va, dan ca, ban va
sac ky » cac ky, sai ky
cac tu » cac thu, cach tu, cac du
ve cac » va cac, vien cac

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