Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
ban danh » ban doanh, ban hanh, ban dan
cua tre » cua te, cuu tre, cua triet
danh vi » hanh vi, dinh vi, danh di
van hoi » van hoa, van hoc, van hoe
cuu ban » cuu van, cua ban, cuu san
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua
sac ky » cac ky
ve cam » ve cham, ve cac, 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) OR (sai ky)) lang van hoi. hieu ((ve cam) or (va cam)) cuu ban danh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sai ky)) lang van hoi. hieu ((ve cam) OR (va cam)) cuu ban danh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) OR (sai ky)) lang van hoi. hieu ((ve cam) or (va cam)) cuu ban danh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) OR (sai ky)) lang van hoi. hieu ((ve cam) or (va cam)) cuu ban danh vi cua tre*.