Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cha du hoc snippets" » "pha du hoc snippets", "cua du hoc snippets", "chay dua hoc snippets", "cha tu hoc snippets", "cha duoc hoc 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: (((("cha du hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cha du hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cha du hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cha du hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.