Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"liu hoang du snippets" » "luu hoang du snippets", "le hoang du snippets", "iii hoang du snippets", "liu hoang duy snippets", "liu hoang duc snippets", "liu hoang 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: (((("liu hoang 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: (((("liu hoang du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( liu hoang du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("liu hoang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.