Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tham khao do snippets" » "tham khac do snippets", "tham khao co snippets", "tham khao noi snippets", "pham khao do snippets", "tam khao do snippets", "than khao do 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 khao do 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 khao do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tham khao do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tham khao do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.