Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
ban hanh » ban hang
lang van » dang van, tang van, hoang van
cham duc » pham duc, cham soc, pham duy
vu cham » va cham, vu kham, tu cham
duc ban » duc tan, duc van, dua ban
tu dang » thu dang, tu dong, su dang
lang xa » lang ha, dang xay
hieu vu » hieu va, hieu ve, hieu su
dang y » 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 y ((lang xa) or (lang van)) hoi. hieu vu cham duc ban hanh vi ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dang y ((lang xa) OR (lang van)) hoi. hieu vu cham duc ban hanh vi ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu dang y ((lang xa) or (lang van)) hoi. hieu vu cham duc ban hanh vi ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: tu dang y ((lang xa) or (lang van)) hoi. hieu vu cham duc ban hanh vi ((cua triet) OR (cua viet))*.