Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"bich van hoe snippets" » "tich van hoe snippets", "bach van hoe snippets", "binh van hoe snippets", "bich van hoa snippets", "bich van hoc snippets", "bich van hieu 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: (((("bich van hoe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("bich van hoe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( bich van hoe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("bich van hoe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.