Perhaps you should try some spelling variations:
within class » within case, within chaos, within laws
pt within » act within, fit within, hit within
yao yang » yang yang
dan yang » daun yang, tan yang, wang yang
class wo » class do, class work, class war
land pt » land part
wo bin » wu bin

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

• Performing a fuzzy search may retrieve terms with similar spellings: (wing or lang) ((yao yang) or (dan yang)) land pt within class wo bin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (wing OR lang) ((yao yang) OR (dan yang)) land pt within class wo bin ;*.