Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cac luoc » cac nuoc, cac cuoc, cac quoc
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
le cuu » le cua, le huu, le cau

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 xa hoi. hieu ve cac luoc ((van ban) or (van thanh)) le cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang xa hoi. hieu ve cac luoc ((van ban) OR (van thanh)) le cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. hieu ve cac luoc ((van ban) or (van thanh)) le cuu tre*.