Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham tai hoc snippets" » "pham thi hoc snippets", "pham van hoc snippets", "pham thai hoc snippets", "pham dai hoc snippets", "pham bai 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: (((("pham tai 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: (((("pham tai hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham tai hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham tai hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.