Perhaps you should try some spelling variations:
vay doanh » van doanh, ly doanh, voi doanh
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
toc vay » toc tay, toc va, toc giay
dan cua » dan ca, ban cua, dai cua
dao cua » dai cua, day cua, do cua
van cac » van hac, van cau, van bac
cac toc » cac toi, cac nuoc, cac thoi
sach ty » sach y, sach tu, xach tay
tang xa » trang xa, tang ma, lang xa

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 ty) OR (sach thu)) tang xa hoi. hieu van cac toc vay doanh ((dao cua) OR (dan cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach thu)) tang xa hoi. hieu van cac toc vay doanh ((dao cua) or (dan cua)) te~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) OR (sach thu)) tang xa hoi. hieu van cac toc vay doanh ((dao cua) or (dan cua)) te*.