Perhaps you should try some spelling variations:
"small development studies." » "small development services.", "small development strategies.", "small development strategy.", "smart development studies.", "rail development studies.", "well development studies."
"skill development studies." » "skill development services.", "skill development strategies.", "skill development strategy.", "skills development studies.", "social development studies.", "child development studies."
"_ development series." » "_ development services.", "_ development agencies.", "_ development africa."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("small development studies.") OR ("skill development studies."))) or ("_ development series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("small development studies.") OR ("skill development studies."))) OR ("_ development series.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"small development studies.\") OR (\"skill development studies.\"))) or (\"_ development series.\"))".
• Removing quotes may allow a broader search: (((( small development studies. ) OR ( skill development studies. ))) or ( _ development series. )).
• Adding a wildcard symbol may retrieve word variants: (((("small development studies.") OR ("skill development studies."))) or ("_ development series."))*.