Perhaps you should try some spelling variations:
"world basics technical paper" » "world basics techniques paper", "world basic technique paper", "world statistics technical paper", "world basic technical paper", "world brics technical paper", "world haptics technical paper"
"word basics technical paper" » "word basics techniques paper", "word basic technique paper", "word statistics technical paper", "world basic technical paper", "bond basics technical paper", "cord basic technical paper"
"worlds basic technical paper" » "worlds basic mechanical paper", "worlds basic technique paper", "worlds basic techniques paper", "world basic technical paper", "words basic technical paper", "worlds based technical paper"
"world bank technical papers" » "world banks technical papers", "world back technical papers", "world lanka technical papers"

Try widening your search to All Fields.

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