Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dai thi hong snippets" » "dai thi cong snippets", "dai thi phuong snippets", "dai thi hanh snippets", "dan thi hong snippets", "dao thi hong snippets", "tai 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: (((("dai thi 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: (((("dai thi hong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dai thi hong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dai thi hong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.