Perhaps you should try some spelling variations:
doanh dai » doanh tai, doanh dao, doanh giai
hieu van » hieu va, thien van, lieu va
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
van cac » van hac, van cau, van bac
te sai » te tai, te bai, te lai
toc ta » toc tay, toc thai
toc va » tuc va, loc va, tac va
sai ky » sac ky
ha hoi » hoa hoi, ha noi, xa hoi
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 sai ky lang ha hoi. hieu van cac ((((toc va) OR (toc ta))) OR (hoc va)) doanh dai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky lang ha hoi. hieu van cac ((((toc va) OR (toc ta))) or (hoc va)) doanh dai cua te~".
• Adding a wildcard symbol may retrieve word variants: te sai ky lang ha hoi. hieu van cac ((((toc va) OR (toc ta))) or (hoc va)) doanh dai cua te*.