Perhaps you should try some spelling variations:
"va dung open snippets" » "va dung code snippets", "va dung tren snippets", "va dung nen snippets", "va dung len snippets", "van dung open snippets", "va duong open snippets", "vat dung open snippets"
"locating bug code slippers" » "locating bug code snippets", "locating bung code slippers", "locating bugs code slippers"
"using data java snippets" » "using java java snippets", "using sat java snippets", "missing data java snippets"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("va dung open snippets") or ("using data java snippets"))) or ("locating bug code slippers"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("va dung open snippets") OR ("using data java snippets"))) OR ("locating bug code slippers")).
• Removing quotes may allow a broader search: (((( va dung open snippets ) or ( using data java snippets ))) or ( locating bug code slippers )).
• Adding a wildcard symbol may retrieve word variants: (((("va dung open snippets") or ("using data java snippets"))) or ("locating bug code slippers"))*.