Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mong van du snippets" » "muong van du snippets", "song van du snippets", "tong van du snippets", "mong van duy snippets", "mong van dau snippets", "mong van de 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: (((("mong van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mong van du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mong van du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mong van du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.