Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham su voi snippets" » "pham tu voi snippets", "pham vu voi snippets", "phap su voi snippets", "pham sua voi snippets", "pham su vi snippets", "pham so voi 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: (((("pham su 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: (((("pham su voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham su voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham su voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.