Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
xay hoi » xa hoi, tay hoi, cay phoi
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cuu tre » cua tre, cau tren, cau treo
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ky van » ly van, ty van, ky va
ve cac » va cac
di cuu » di cau, di cua, dinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky van xay hoi. hieu ((ve cac) OR (vien cac)) nuoc va hanh di cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky van xay hoi. hieu ((ve cac) OR (vien cac)) nuoc va hanh di cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sai ky van xay hoi. hieu ((ve cac) OR (vien cac)) nuoc va hanh di cuu tre*.