Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh doi » thanh loi, thanh moi, thanh do
dang xay » dang van, van xay
cham xuc » cam xuc, chat xuc, pham duc
xay hoi » xa hoi, tay hoi, cay phoi
doi cua » dai cua, hoi cua
san ky » sang ky, dan ky, ban ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((san ky) or (van ky)) dang xay hoi. hieu qua ((cham xuc) OR (cham soc)) van thanh doi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((san ky) OR (van ky)) dang xay hoi. hieu qua ((cham xuc) OR (cham soc)) van thanh doi cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((san ky) or (van ky)) dang xay hoi. hieu qua ((cham xuc) OR (cham soc)) van thanh doi cua vat".
• Adding a wildcard symbol may retrieve word variants: tu ((san ky) or (van ky)) dang xay hoi. hieu qua ((cham xuc) OR (cham soc)) van thanh doi cua vat*.