Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cuu tre » cua tre, cau tren, cau treo
nang xa » lang xa, nang ma, mang xa
xuc van » duc van, luc van, xuc ban
ve cac » va cac, vien cac
vi cuu » vi luu, vinh cuu
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
ve cam » ve cham, va cam, 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 sai ky ((nang xa) OR (nang x)) hoi. hieu ((ve cam) or (ve cac)) xuc van hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((nang xa) OR (nang x)) hoi. hieu ((ve cam) OR (ve cac)) xuc van hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky ((nang xa) OR (nang x)) hoi. hieu ((ve cam) or (ve cac)) xuc van hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((nang xa) OR (nang x)) hoi. hieu ((ve cam) or (ve cac)) xuc van hanh vi cuu tre*.