Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tham do du snippets" » "thai do du snippets", "pham do du snippets", "tham du du snippets", "tham do duy snippets", "tham do duc snippets", "tham dao du 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: (((("tham do du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tham do du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tham do du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tham do du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.