Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
nam duoc » nam thuoc, da duoc, dat duoc
dang xay » dang van, van xay
danh vai » danh sai, danh va, doanh van
te sach » toc sach
cuu tre » cau tren, cau treo
ma danh » va danh, ma dan, mo danh
duoc ma » duoc lam
xay hoi » xa hoi, tay hoi, cay phoi
cua tre » cua te, cua triet, dua tren
y dang » ky dang, 2 dang, _ dang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y dang xay hoi. ((hieu quan) OR (hieu qua)) nam duoc ma danh vai ((cuu tre) OR (cua tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y dang xay hoi. ((hieu quan) or (hieu qua)) nam duoc ma danh vai ((cuu tre) OR (cua tre))~".
• Adding a wildcard symbol may retrieve word variants: te sach y dang xay hoi. ((hieu quan) or (hieu qua)) nam duoc ma danh vai ((cuu tre) OR (cua tre))*.