Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"gian van due snippets" » "giang van due snippets", "gian dan due snippets", "gian lan due snippets", "gian van de snippets", "gian van duy snippets", "gian van du 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: (((("gian van due snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("gian van due snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( gian van due snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("gian van due snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.