Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van tan soc snippets" » "van tuan soc snippets", "van ban soc snippets", "van tai soc snippets", "van dan soc snippets", "van tan soi snippets", "van tan son snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

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