Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham duc » pham duc, cham soc, phan duc
ban hanh » ban hang
lang van » dang van, tang van, hoang van
pham duy » pham duc
hanh di » hanh vi, hanh de, hang di
dong ky » duong ky, hong ky, dong y
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu dong ky ((lang xa) or (lang van)) hoi. hieu ve ((cham duc) or (pham duy)) ban hanh di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dong ky ((lang xa) OR (lang van)) hoi. hieu ve ((cham duc) OR (pham duy)) ban hanh di cua triet.
• Adding a wildcard symbol may retrieve word variants: tu dong ky ((lang xa) or (lang van)) hoi. hieu ve ((cham duc) or (pham duy)) ban hanh di cua triet*.