Perhaps you should try some spelling variations:
rptas » ptas, rtas, rpbas, rptask, rptaps, rpptas
pass » mass, bass
tas » task, taps, ptas
ptaskk » ptaskkk, ptapskk, pptaskk
tasks » taskks, tapsks, ptasks, task
past » east, part
gaps » gap, gas, maps
rios » riots, rio, ios

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((((rptas or (pass or tas)) or past) or (ptaskk or tasks)) or gaps) or rios)-ibg books series.~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((((rptas OR (pass OR tas)) OR past) OR (ptaskk OR tasks)) OR gaps) OR rios)-ibg books series..
• Adding a wildcard symbol may retrieve word variants: (((((rptas or (pass or tas)) or past) or (ptaskk or tasks)) or gaps) or rios)-ibg books series.*.