Perhaps you should try some spelling variations:
dang xay » dang van, van xay
nam duoc » nam thuoc, da duoc, dat duoc
dua tren » dung tren
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
cua su » qua su

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 ((nam duoc) or (cam xuc)) va danh vi ((dua tren) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky dang xay hoi. hieu qua ((nam duoc) OR (cam xuc)) va danh vi ((dua tren) OR (cua su)).
• Adding a wildcard symbol may retrieve word variants: tu cac ky dang xay hoi. hieu qua ((nam duoc) or (cam xuc)) va danh vi ((dua tren) or (cua su))*.