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, vuc van
ve cac » va cac, vien cac
vi cuu » vi luu, vinh cuu
tu cai » tu cac, tu can, tu bai
cai ky » cao ky, cac ky, cam 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 cai 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 cai 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 cai ky ((nang xa) or (nang x)) hoi. hieu ((ve cam) or (ve cac)) xuc van hanh vi cuu tre*.