Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hai viet du snippets" » "thai viet du snippets", "mai viet du snippets", "tai viet du snippets", "hai viet duc snippets", "hai viet duy snippets", "hai viet tu 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: (((("hai viet 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: (((("hai viet du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hai viet du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hai viet du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.