Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua dieu
ban hanh » ban hang
cham duc » pham duc, cham soc, pham duy
lang van » dang van, tang van, hoang van
hieu vu » hieu va, hieu ve, hieu su
duc ban » duc tan, duc van, dua ban
vu cham » va cham, vu kham, tu cham
tu dang » thu dang, tu dong, su dang
dang ky » dang y, dan ky, dong ky
lang xa » lang ha, dang xay

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu dang ky ((lang xa) or (lang van)) hoi. hieu vu cham duc ban hanh vi ((cua viet) OR (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dang ky ((lang xa) OR (lang van)) hoi. hieu vu cham duc ban hanh vi ((cua viet) OR (cua vat))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu dang ky ((lang xa) or (lang van)) hoi. hieu vu cham duc ban hanh vi ((cua viet) OR (cua vat))*".