Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khi van chi snippets" » "thi van chi snippets", "chi van chi snippets", "phi van chi snippets", "khi van chien snippets", "khi luan chi snippets", "khi 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: (((("khi van chi 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 van chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khi van chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi van chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.