Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khat van cho snippets" » "hat van cho snippets", "chat van cho snippets", "khao van cho snippets", "khat van chi snippets", "khat san cho snippets", "khat 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: (((("khat 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: (((("khat van cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khat van cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khat van cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.