Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sanh van » san van, anh van, canh van
van hanh » van thanh, ban hanh, van anh
dang xay » dang van, van xay
truc van » truc va, thuc van, truc ban
cua tre » cua te, cuu tre, dua tren
hanh ve » hanh vi, hanh va, hanh kem
so sanh » do sanh
lang xa » lang ha, lang van
hieu ve » hieu va, hieu van
ve cau » ke cau, va cau, ve 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 sanh van ((lang xa) OR (dang xay)) hoi. hieu ve cau truc van hanh ve ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh van ((lang xa) OR (dang xay)) hoi. hieu ve cau truc van hanh ve ((cua tre) or (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: so sanh van ((lang xa) OR (dang xay)) hoi. hieu ve cau truc van hanh ve ((cua tre) or (cua triet))*.