Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao van he snippets" » "cac van he snippets", "dao van he snippets", "cao dang he snippets", "cao van hoe snippets", "cao van hue snippets", "cao van de 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: (((("cao van he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cao van he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao van he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao van he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.