Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duong ham so snippets" » "duong cham so snippets", "duong lam so snippets", "duong tam so snippets", "duong nam so snippets", "duong cham soc 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: (((("duong ham so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong ham so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong ham so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong ham so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.