Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van than soi snippets" » "van thanh soi snippets", "van thang soi snippets", "van tuan soi snippets", "van tan soi snippets", "van than roi snippets", "van than so 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 than soi 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 than soi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van than soi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van than soi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.