Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi thuat de snippets" » "phau thuat de snippets", "khoi thuat de snippets", "ki thuat de snippets", "phi thuat do snippets", "phi thuat he snippets", "phi thuat dien 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: (((("phi thuat de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phi thuat de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi thuat de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi thuat de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.