Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, cham soc
van cham » van chat, van tham, va cham
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
xuc van » duc van, luc van, xuc ban
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, mang xa, ang xa
cuu tre » cua tre, cau tren, cau treo
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 ky ((((nang xa) or (nang ma))) or (lang xa)) hoi. hieu van cham xuc van hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((((nang xa) OR (nang ma))) OR (lang xa)) hoi. hieu van cham xuc van hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((((nang xa) or (nang ma))) or (lang xa)) hoi. hieu van cham xuc van hanh vi cuu tre*.