Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vanh dai » van dai, vanh tai, lanh dao
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
xanh di » danh di, xanh tai
cua tre » cua te, cuu tre, dua tren
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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: te sac ky nang x hoi. hieu ve cac duc va ((xanh di) OR (vanh dai)) ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang x hoi. hieu ve cac duc va ((xanh di) OR (vanh dai)) ((cua tre) or (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang x hoi. hieu ve cac duc va ((xanh di) OR (vanh dai)) ((cua tre) or (cua triet))*.