Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"moi xuan can snippets" » "moi quan can snippets", "mai xuan can snippets", "thi xuan can snippets", "moi xuan cang snippets", "moi xuan tan snippets", "moi 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: (((("moi 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: (((("moi xuan can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( moi xuan can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("moi xuan can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.