Perhaps you should try some spelling variations:
thanh ve » hanh ve, thanh va, thanh vien
cac hoi » cac thoi, cac khoi, cau hoi
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
xuc ban » duc ban, cuc ban, quoc ban
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
ve cua » le cua, de cua, te 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 ((sach dao) OR (lanh dao)) trong cac hoi. hieu va cam ((xuc van) or (xuc ban)) thanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach dao) OR (lanh dao)) trong cac hoi. hieu va cam ((xuc van) OR (xuc ban)) thanh ve cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach dao) OR (lanh dao)) trong cac hoi. hieu va cam ((xuc van) or (xuc ban)) thanh ve cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach dao) OR (lanh dao)) trong cac hoi. hieu va cam ((xuc van) or (xuc ban)) thanh ve cua tre*.