Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dang xay » dang van, van xay
thanh ha » thanh hoa, thanh hai, nhanh ha
va thanh » gia thanh, ban thanh, va tinh
vu khac » vu kham, vu khanh, bui khac
cua tre » cua te, cua triet, dua tren
cac luc » cau luc, coc luc, cac nuoc
ky dang » ky nang, ky danh
hieu ve » hieu va
xay hoi » xa hoi, tay hoi, cay phoi
cuu tre » cau tren, cau treo
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khac ky dang xay hoi. ((hieu ve) or (hieu van)) cac luc va thanh ha ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khac ky dang xay hoi. ((hieu ve) OR (hieu van)) cac luc va thanh ha ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khac ky dang xay hoi. ((hieu ve) or (hieu van)) cac luc va thanh ha ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: vu khac ky dang xay hoi. ((hieu ve) or (hieu van)) cac luc va thanh ha ((cua tre) OR (cuu tre))*.