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