Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
dieu tra » dieu tri, kiem tra, dieu cua
lang van » dang van, tang van, hoang van
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
luc van » luoc van, luu van, duc van
te cua » tue cua, le cua, de cua
te sai » te tai, te bai, te lai
sai ky » sac ky
ve coc » ve cuoc, ve cac, ve co

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky ((nang xa) or (lang van)) hoi. hieu ve coc luc van hanh ((dieu tra) or (te cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky ((nang xa) OR (lang van)) hoi. hieu ve coc luc van hanh ((dieu tra) OR (te cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sai ky ((nang xa) or (lang van)) hoi. hieu ve coc luc van hanh ((dieu tra) or (te cua)) tre*.