Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khi tap cho snippets" » "khu tap cho snippets", "khi ap cho snippets", "khi ta cho snippets", "khi tap co snippets", "khi cap cho snippets", "khi tap chi 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: (((("khi tap 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: (((("khi tap cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khi tap cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi tap cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.