Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
sach uu » sach luu, sach tu, sach xu
uu dang » huu dang, su dang, vu dang
dang xa » dang xay, lang xa, dang ha
luc van » luoc van, luu van, duc van
va dau » va dao
vi cua » vai cua, di cua
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach uu dang xa hoi. hieu ((va cac) or (va dau)) luc van hanh vi cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach uu dang xa hoi. hieu ((va cac) OR (va dau)) luc van hanh vi cua su.
• Adding a wildcard symbol may retrieve word variants: te sach uu dang xa hoi. hieu ((va cac) or (va dau)) luc van hanh vi cua su*.