Perhaps you should try some spelling variations:
dang xay » dang van, van xay
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » hieu qua
cac luc » cau luc, coc luc, cac nuoc
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky
luc va » duc va, tuc va, loc va
vi cua » di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu can ky dang xay hoi. ((hieu va) or (lieu va)) cac luc va hanh ((vi cua) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky dang xay hoi. ((hieu va) OR (lieu va)) cac luc va hanh ((vi cua) OR (vai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu can ky dang xay hoi. ((hieu va) or (lieu va)) cac luc va hanh ((vi cua) or (vai cua)) tre*.