Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cac luoc » cac nuoc, cac cuoc, cac quoc
van hanh » ban hanh, van anh, van ban
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
hieu ve » hieu van
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
le cua » ly cua
te sac » te sach, te cac, te san

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 lang xa hoi. ((hieu ve) OR (hieu va)) cac luoc ((van hanh) OR (van thanh)) le cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang xa hoi. ((hieu ve) OR (hieu va)) cac luoc ((van hanh) or (van thanh)) le cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. ((hieu ve) OR (hieu va)) cac luoc ((van hanh) or (van thanh)) le cua tre*.