Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
xuc van » duc van, luc van, vuc van
dau xuc » dau xac, dau xua, dau nuoc
van dau » van dao, phan dau
cuu tre » cua tre, cau tren, cau treo
sach tu » sach thu, cach tu, sach ty
nang xa » lang xa, nang ma, mang xa
vi cuu » vi luu, vinh cuu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach tu) or (sach y)) ((nang xa) or (nang x)) hoi. hieu van dau xuc van hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (sach y)) ((nang xa) OR (nang x)) hoi. hieu van dau xuc van hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (sach y)) ((nang xa) or (nang x)) hoi. hieu van dau xuc van hanh vi cuu tre*.