Perhaps you should try some spelling variations:
dang xay » dang van, van xay
phat tuc » phan tu, luat tuc, pham tu
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
tuc van » thuc van, truc van, tuc va
cua tre » cua te, cuu tre, cua triet
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: te sach y ((((nang xa) OR (nang x))) or (dang xay)) hoi. hieu va phat tuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((((nang xa) OR (nang x))) OR (dang xay)) hoi. hieu va phat tuc van hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((((nang xa) OR (nang x))) or (dang xay)) hoi. hieu va phat tuc van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach y ((((nang xa) OR (nang x))) or (dang xay)) hoi. hieu va phat tuc van hanh vi cua tre*.