Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh ve » thanh va, thanh vien, thanh van
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
hanh ve » hanh vi, hanh va, hanh kem
cua tre » cua te, cuu tre, dua tren
tu cam » tu cham, tu cac, tu nam
cam ky » cao ky, cac ky
ve nam » he nam, va nam, le nam
thu va » thuc va, thue va, tu va

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: tu cam ky nang cao hoi. hieu ve nam thu va ((thanh ve) OR (hanh ve)) ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cam ky nang cao hoi. hieu ve nam thu va ((thanh ve) or (hanh ve)) ((cua tre) OR (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: tu cam ky nang cao hoi. hieu ve nam thu va ((thanh ve) or (hanh ve)) ((cua tre) OR (cua triet))*.