Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, pham duc
dang xay » dang van, van xay
ca viet » va viet, co viet, hoa viet
hanh di » hanh vi, hanh de, hang di
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
tu ban » thu ban, te ban
tu san » thu san, tu can, vu san
di ca » di cau, di cua, doi ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu san) or (tu ban)) ky dang xay hoi. hieu va ((cham xuc) OR (cham soc)) van hanh di ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (tu ban)) ky dang xay hoi. hieu va ((cham xuc) OR (cham soc)) van hanh di ca viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu san) or (tu ban)) ky dang xay hoi. hieu va ((cham xuc) OR (cham soc)) van hanh di ca viet".
• Adding a wildcard symbol may retrieve word variants: ((tu san) or (tu ban)) ky dang xay hoi. hieu va ((cham xuc) OR (cham soc)) van hanh di ca viet*.