Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tang van » dang van, hoang van, trong van
va cham » va tham
va chat » van chat, va phat, cao chat
nang xa » nang x, lang xa, nang ma
xuc van » duc van, luc van, vuc van
vi cua » vai cua, di cua
su xac » pu xac, su cac
xac ky » cac ky, sac ky, bac ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ky ((nang xa) or (tang van)) hoi. hieu ((va cham) OR (va chat)) xuc van hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky ((nang xa) OR (tang van)) hoi. hieu ((va cham) OR (va chat)) xuc van hanh vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky ((nang xa) or (tang van)) hoi. hieu ((va cham) OR (va chat)) xuc van hanh vi cua te*".