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