Perhaps you should try some spelling variations:
hoach khoi » hoach hoi, hoc khoi, hoach hoa
nghiep su » nghiep sua, nghiep vu, nghiep so
sach dao » lanh dao
dao nghe » day nghe, da nghe, dat nghe
su sach » so sach, vu sach
du hoc » tu hoc, duoc hoc
su hoc » tu hoc, so hoc, su ho
d hoc » ad hoc, de hoc, _ hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach dao nghe ((((d hoc) OR (y hoc))) or (du hoc)) ) or ( thu hoach khoi nghiep su hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach dao nghe ((((d hoc) OR (y hoc))) OR (du hoc)) ) OR ( thu hoach khoi nghiep su hoc ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( su sach dao nghe ((((d hoc) OR (y hoc))) or (du hoc)) ) or ( thu hoach khoi nghiep su hoc ))*".