Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tac van cho snippets" » "tac vang cho snippets", "cac van cho snippets", "tac va cho snippets", "tac van chi snippets", "tac san cho snippets", "tac van chat 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: (((("tac van cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tac van cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tac van cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tac van cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.