Perhaps you should try some spelling variations:
nghiep duoc » nghiem duoc, nghiep cuoc, nghiep quoc
thu doanh » thu oanh, tri doanh, thu hoach
va nghiep » va nghien, lam nghiep, cac nghiep
sach dat » sach dao, sach danh, sach bai
dat nghe » day nghe, da nghe, dang nghe
doanh va » doan va, doanh tai, doanh cua
duoc hoc » quoc hoi
te sach » toc sach
nghe d » nghe di, nghe _, nghe 新
d hoc » du hoc, ad hoc, de hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sach dat nghe d hoc ) or ( thu doanh va nghiep duoc hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach dat nghe d hoc ) OR ( thu doanh va nghiep duoc hoc )).
• Adding a wildcard symbol may retrieve word variants: (( te sach dat nghe d hoc ) or ( thu doanh va nghiep duoc hoc ))*.