Perhaps you should try some spelling variations:
qua thanh » quan thanh, cua thanh, qua than
dang xay » dang van, van xay
thanh le » thinh le, thanh ve, thanh de
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky dang xay hoi. hieu qua thanh le ((ban hanh) OR (van hanh)) ((vi luu) OR (vi lua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky dang xay hoi. hieu qua thanh le ((ban hanh) OR (van hanh)) ((vi luu) OR (vi lua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu cac ky dang xay hoi. hieu qua thanh le ((ban hanh) OR (van hanh)) ((vi luu) OR (vi lua)) tre*.