Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
dang xay » dang van, van xay
cac duc » cac du, cao duc, cac dac
cua tre » cua te, cuu tre, dua tren
duc van » duc va, duc tan, duc manh
so hanh » so sanh, so danh, co hanh
hanh ky » hanh kem
lang xa » lang ha, lang van
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac

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

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