Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tham va moi snippets" » "pham va moi snippets", "thai va moi snippets", "than va moi snippets", "tham va mot snippets", "tham ve moi snippets", "tham va mo 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 va moi 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 va moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tham va moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tham va moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.