Perhaps you should try some spelling variations:
dang van » hoang van, hang va
sang ky » sang kyo, dang ky, bang ky
xanh di » danh di, vanh dai, xanh tai
danh vi » hanh vi, dinh vi, danh di
cuu ban » cuu van, cua ban, cuu san
cam cuu » cham cuu, cap cuu
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
van hoi » van hoa, van hoc, van hoe
tang ky » dang ky, trong ky, tang khu
ve cam » ve cham, ve cac, va cam

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

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