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