Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van du hoi snippets" » "van du code snippets", "van duy hoi snippets", "van dau hoi snippets", "van de hoi snippets", "van du hoc snippets", "van lu hoi snippets", "van di hoi 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 du hoi 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 du hoi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van du hoi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van du hoi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.