Perhaps you should try some spelling variations:
doanh dan » doanh ban, doanh van, doanh dao
van bac » van ban, van bao, van hac
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
van cac » van hac, van cau, dan cac
dan cua » dan ca, ban cua, dai cua
te sac » te sach, te cac, te san
toc va » toc ta, tuc va, loc va
sac ky » cac ky, sai ky
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: te sac ky tang xa hoi. hieu ((van cac) OR (van bac)) ((toc va) OR (hoc va)) doanh dan cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky tang xa hoi. hieu ((van cac) OR (van bac)) ((toc va) or (hoc va)) doanh dan cua te~".
• Adding a wildcard symbol may retrieve word variants: te sac ky tang xa hoi. hieu ((van cac) OR (van bac)) ((toc va) or (hoc va)) doanh dan cua te*.