Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
dang van » hoang van, hang va
vien dai » hien dai
cua tre » cua te, cuu tre, cua triet
loc van » luoc van, hoc van, lo van
vien da » hien dai
nang xa » nang x, lang xa, nang ma
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
te sac » te sach, te cac, te san

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 (dang van)) hoi. hieu ((vien da) or (vien dai)) loc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((nang xa) OR (dang van)) hoi. hieu ((vien da) OR (vien dai)) loc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky ((nang xa) or (dang van)) hoi. hieu ((vien da) or (vien dai)) loc van hanh vi cua tre*.