Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hieu van » hieu va, thien van, hieu ve
xuc toan » duc toan, xuan toan, quoc toan
doanh va » doan va, doanh tai, doanh cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
lam xuc » cam xuc, lam duoc
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky dang xay hoi. ((hieu van) OR (lieu va)) lam xuc toan doanh va ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang xay hoi. ((hieu van) OR (lieu va)) lam xuc toan doanh va ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang xay hoi. ((hieu van) OR (lieu va)) lam xuc toan doanh va ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang xay hoi. ((hieu van) OR (lieu va)) lam xuc toan doanh va ((cua tre) or (cua te))*.