Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phap thi moi snippets" » "pham thi moi snippets", "phan thi moi snippets", "phap thu moi snippets", "phap thi mai snippets", "phap thi mo snippets", "phap thi hoai 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: (((("phap thi moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phap thi moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap thi moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap thi moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.