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