Perhaps you should try some spelling variations:
"van trinh thuc snippets" » "van trinh tu snippets", "van trinh thi snippets", "van thinh thuc snippets", "van tinh thuc snippets", "dan trinh thuc snippets", "van trinh thuc slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"dung java java snippets\") OR (\"van trinh thuc snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( dung java java snippets ) OR ( van trinh thuc snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") OR ("van trinh thuc snippets"))) OR ("locating bug code snippets"))*.