Perhaps you should try some spelling variations:
"world basics techniques paper" » "world basic techniques paper", "world basic technique paper", "world based techniques paper", "world basics techniques upper", "world basics techniques peter", "world basics techniques pattern", "word basics techniques paper", "world brics techniques paper"
"world basics technical paper" » "world basic technical paper", "world devices technical paper", "world basic technique paper", "world basics technical papers", "word basics technical paper", "world brics technical paper"
"world apps technical paper" » "world apps technical papers", "world app technical paper", "world apis technical paper", "world access technical paper"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("world apps technical paper") OR ((("world basics technical paper") OR ("world basics techniques paper")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"world apps technical paper\") or (((\"world basics technical paper\") OR (\"world basics techniques paper\"))))".
• Removing quotes may allow a broader search: (( world apps technical paper ) or ((( world basics technical paper ) OR ( world basics techniques paper )))).
• Adding a wildcard symbol may retrieve word variants: (("world apps technical paper") or ((("world basics technical paper") OR ("world basics techniques paper"))))*.