Perhaps you should try some spelling variations:
"5 wt decrease" » "5 _ decrease" (Expand Search), "_ wt decrease" (Expand Search), "2 wt decrease" (Expand Search), "i wt decrease" (Expand Search)
"5 ht decrease" » "5 _ decrease" (Expand Search)
"50 n decrease" » "50 _ decrease" (Expand Search), "50 _ decreased" (Expand Search), "50 _ decreases" (Expand Search), "50 i decrease" (Expand Search)
"_ e decrease" » "_ _ decrease" (Expand Search), "_ _ decreased" (Expand Search), "_ _ decreases" (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("50 n decrease") OR ((("_ e decrease") OR ((("5 wt decrease") OR ("5 ht decrease"))))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"50 n decrease\") OR (((\"_ e decrease\") OR (((\"5 wt decrease\") OR (\"5 ht decrease\"))))))".
• Removing quotes may allow a broader search: (( 50 n decrease ) OR ((( _ e decrease ) OR ((( 5 wt decrease ) OR ( 5 ht decrease )))))).
• Adding a wildcard symbol may retrieve word variants: (("50 n decrease") OR ((("_ e decrease") OR ((("5 wt decrease") OR ("5 ht decrease"))))))*.