Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham duc » pham duc, cham soc, pham duy
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
dang van » hoang van, hang va
cua tre » cua te, cuu tre, dua tren
duc van » duc va, duc tan, duc manh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
lang xa » lang ha, dang xay, lang van
sai ky » sac ky
tu sai » tu bai, tu san, tu cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky ((lang xa) or (dang van)) hoi. hieu ve cham duc van hanh vai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky ((lang xa) OR (dang van)) hoi. hieu ve cham duc van hanh vai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky ((lang xa) or (dang van)) hoi. hieu ve cham duc van hanh vai ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((lang xa) or (dang van)) hoi. hieu ve cham duc van hanh vai ((cua tre) OR (cua triet))*.