Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
dang xay » dang van, van xay
cham sac » cham soc, pham sach, cap sac
vu cham » va cham, vu kham, tu cham
ban cua » ban quan
san cua » sang cua, dan cua, nan cua
sac van » cac van, san van, sat van
hieu vu » hieu va, hieu ve, hieu su
lang xa » lang ha, lang van
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((lang xa) or (dang xay)) hoi. hieu vu cham sac van thanh ((san cua) or (ban cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((lang xa) OR (dang xay)) hoi. hieu vu cham sac van thanh ((san cua) OR (ban cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((lang xa) or (dang xay)) hoi. hieu vu cham sac van thanh ((san cua) or (ban cua)) tre*.