Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khi den voi snippets" » "khi dien voi snippets", "khi nen voi snippets", "khi ben voi snippets", "khi den coi snippets", "khi den vai 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: (((("khi den voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khi den voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khi den voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi den voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.