Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"bac van cung snippets" » "bac van cuong snippets", "bac van dung snippets", "bac van hung snippets", "bach van cung snippets", "cac van cung snippets", "ban van cung 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: (((("bac van cung snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("bac van cung snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( bac van cung snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("bac van cung snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.