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