Perhaps you should try some spelling variations:
"hang ca cong snippets" » "hang ca code snippets", "hang va cong snippets", "nang cao cong snippets", "hang tai cong snippets", "hang cua cong snippets", "hang cac cong snippets", "hang cao cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data 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: (((("python using java snippets") or ("hang ca cong snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("hang ca cong snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( hang ca cong snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("hang ca cong snippets"))) or ("locating bug core snippets"))*.