Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
vay doanh » van doanh, ly doanh, voi doanh
hieu van » hieu va, thien van, lieu va
van cua » vang cua, ban cua, dan cua
tuc vay » tuc va, tu vay, tuc xay
cau tuc » cau truc, cau tu, cau luc
van cau » van dau, van hau, van chat
te sach » toc sach
sach ky » sac ky, sach y, sach ty
sang ma » tang ma, sang tao, sang tai
nang ma » tang ma, nang cao
cua tre » cua te, cuu tre, cua triet

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 ((nang ma) or (((sang ma) OR (mang may)))) hoi. hieu van cau tuc vay doanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang ma) OR (((sang ma) OR (mang may)))) hoi. hieu van cau tuc vay doanh van cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang ma) or (((sang ma) OR (mang may)))) hoi. hieu van cau tuc vay doanh van cua tre*".