Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
doanh va » doan va, doanh tai, doanh cua
thi lan » thi hanh, thi nang, thi lien
va quan » van quan, tac quan, hai quan
toc van » hoc van, toc san, tac van
cac toc » cac toi, cac nuoc, cac thoi
quan te » quan he, quan ve, quang tue
thi van » thi hanh, thi nang
nang ha » nang hai, nang han, nang hoa
ha hoi » hoa hoi, ha noi, xa hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) OR (hoc sach)) ky nang ha hoi. ((thi van) or (thi lan)) cac toc van doanh va quan te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ky nang ha hoi. ((thi van) OR (thi lan)) cac toc van doanh va quan te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) ky nang ha hoi. ((thi van) or (thi lan)) cac toc van doanh va quan te*".