Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"voi phong so snippets" » "hai phong so snippets", "van phong so snippets", "mo phong so snippets", "voi phong mo snippets", "voi phong cho snippets", "voi cong 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: (((("voi phong so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("voi phong so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( voi phong so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("voi phong so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.