Perhaps you should try some spelling variations:
thinking aloud » thinking about
thinking john » thinking can, thinking form, thinking four
als abstract » tails abstract, urals abstract, als abstrakte
wang lang » wang liang, wang yang, wang luhang
lang lang » ylang ylang
bonn mein » bonn ein
lang als » klang als, langer als, zwang als

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: wang lang lang als abstract ((thinking john) or (thinking aloud)) bonn mein ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang lang lang als abstract ((thinking john) OR (thinking aloud)) bonn mein ;*.