Perhaps you should try some spelling variations:
khach ky » thanh ky
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, cham soc
xuc van » duc van, luc van, vuc van
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
hanh ky » hanh kem
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: vu ((khach ky) OR (hanh ky)) ((nang xa) or (lang xa)) hoi. hieu vu cham xuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((khach ky) OR (hanh ky)) ((nang xa) OR (lang xa)) hoi. hieu vu cham xuc van hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((khach ky) OR (hanh ky)) ((nang xa) or (lang xa)) hoi. hieu vu cham xuc van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: vu ((khach ky) OR (hanh ky)) ((nang xa) or (lang xa)) hoi. hieu vu cham xuc van hanh vi cua tre*.