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