Perhaps you should try some spelling variations:
hanh tri » thanh tri, hanh tai, hanh trinh
va cach » va cac
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
tu dang » thu dang, su dang, vu dang
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: va cach ((tu dang) OR (tu dong)) xay hoi. hieu va cam ((luc va) or (tuc va)) hanh tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: va cach ((tu dang) OR (tu dong)) xay hoi. hieu va cam ((luc va) OR (tuc va)) hanh tri cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "va cach ((tu dang) OR (tu dong)) xay hoi. hieu va cam ((luc va) or (tuc va)) hanh tri cua tre".
• Adding a wildcard symbol may retrieve word variants: va cach ((tu dang) OR (tu dong)) xay hoi. hieu va cam ((luc va) or (tuc va)) hanh tri cua tre*.