Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
lang van » dang van, tang van, hoang van
cua tre » cua te, cuu tre, cua triet
ky lang » ky nang, ky dang, ky tang
van hoi » van hoa, van hoc, van hoe
hieu ve » hieu va, hieu van
cac luc » cau luc, cac nuoc, cac cuoc
de cua » le cua, te cua, dieu cua
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky lang van hoi. hieu ve ((cac luc) or (coc luc)) ((van hanh) OR (van thanh)) de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang van hoi. hieu ve ((cac luc) OR (coc luc)) ((van hanh) OR (van thanh)) de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang van hoi. hieu ve ((cac luc) or (coc luc)) ((van hanh) OR (van thanh)) de cua tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky lang van hoi. hieu ve ((cac luc) or (coc luc)) ((van hanh) OR (van thanh)) de cua tre*.