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