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