Perhaps you should try some spelling variations:
dan thanh » dang thanh, danh thanh, ban thanh
dang xay » dang van, van xay
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat cua » nhat cua, chat va, chat huu
thanh vi » hanh vi, thanh va, thanh ve
nang xa » nang x, lang xa, nang ma
cua dan » cua dang, cua ban, ca dan
cua tre » cua te, cuu tre, cua triet
tu van » tu va
vi cua » vai cua, di 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 van ky ((nang xa) or (dang xay)) hoi. hieu van chat cua dan thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu van ky ((nang xa) OR (dang xay)) hoi. hieu van chat cua dan thanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu van ky ((nang xa) or (dang xay)) hoi. hieu van chat cua dan thanh vi cua tre*.