Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mac thi hong snippets" » "mac thi cong snippets", "mac thi phuong snippets", "mac thi hanh snippets", "cac thi hong snippets", "tac thi hong snippets", "mai thi hong 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: (((("mac thi hong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mac thi hong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mac thi hong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mac thi hong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.