Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tham vu hoan snippets" » "pham vu hoan snippets", "tham du hoan snippets", "tham vu hoang snippets", "tham su hoan snippets", "tham thu hoan 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: (((("tham vu hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tham vu hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tham vu hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tham vu hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.