Perhaps you should try some spelling variations:
doanh dao » doanh bao, doanh cao, doanh giao
toc sach » hoc sach, thuoc sach, nuoc sach
doc sach » hoc sach, nuoc sach, dac sac
va doanh » van doanh, vay doanh, va danh
cac thoi » cac hop, cac tro, cac thu
hieu van » hieu va, thien van, lieu va
dao cua » dai cua, day cua, dan cua
ca phoi » cap phoi, cay phoi, gap phoi
dang ca » dang cac, dan ca, hang ca
ky dang » ky nang, ky danh
cua te » cua tu

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: ((toc sach) OR (doc sach)) ky dang ca phoi. hieu van ((cac toi) OR (cac thoi)) va doanh dao cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (doc sach)) ky dang ca phoi. hieu van ((cac toi) or (cac thoi)) va doanh dao cua te~".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (doc sach)) ky dang ca phoi. hieu van ((cac toi) or (cac thoi)) va doanh dao cua te*.