Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
luc van » luoc van, luu van, duc van
cam luc » cam xuc, cau luc
lang ha » long ha
vi cua » vai cua, di cua
ve cam » ve cham, ve cac, va cam
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((((nang xa) OR (nang x))) or (lang ha)) hoi. hieu ve cam luc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((((nang xa) OR (nang x))) OR (lang ha)) hoi. hieu ve cam luc van hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((((nang xa) OR (nang x))) or (lang ha)) hoi. hieu ve cam luc van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky ((((nang xa) OR (nang x))) or (lang ha)) hoi. hieu ve cam luc van hanh vi cua tre*.