Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hoang van » hang va
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
duc ban » duc van, dua ban, duc man
dong ky » duong ky, hong ky, dong y
vu cham » va cham, vu kham, tu cham
lang xa » lang ha, dang xay, lang van
hieu vu » hieu va, hieu ve, hieu su

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 (hoang van)) hoi. hieu vu cham ((duc ban) OR (duc tan)) hanh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dong ky ((lang xa) OR (hoang van)) hoi. hieu vu cham ((duc ban) OR (duc tan)) hanh vai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu dong ky ((lang xa) or (hoang van)) hoi. hieu vu cham ((duc ban) OR (duc tan)) hanh vai cua triet".
• Adding a wildcard symbol may retrieve word variants: tu dong ky ((lang xa) or (hoang van)) hoi. hieu vu cham ((duc ban) OR (duc tan)) hanh vai cua triet*.