Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach ho mong snippets" » "sach hoi mong snippets", "sach ha mong snippets", "sach lo mong snippets", "sach ho mon snippets", "sach ho nong snippets", "sach cho muong 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: (((("sach ho mong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sach ho mong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach ho mong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach ho mong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.