Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tham cho con snippets" » "tham chi con snippets", "tham khao con snippets", "nham cheo con snippets", "tham cho cong snippets", "tham cho lon snippets", "tham cho can 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 cho con 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 cho con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tham cho con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tham cho con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.