Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong vi hong snippets" » "dong voi hong snippets", "dong va hong snippets", "don vi hong snippets", "dong vu hong snippets", "dong vi dong snippets", "dong thi hong 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: (((("dong vi hong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong vi hong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong vi hong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong vi hong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.