Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xuan can hoc snippets" » "xuan cang hoc snippets", "xuan tan hoc snippets", "xuan chanh hoc snippets", "xuan van hoc snippets", "xuan dan hoc snippets", "xuan cao hoc 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: (((("xuan can hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xuan can hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuan can hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuan can hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.