Perhaps you should try some spelling variations:
day nghiep » lam nghiep, cac nghiep, dau nghien
hoach day » hoach xay, hoach dat, hoach thay
dao nghe » day nghe, da nghe, dat nghe
sach dao » lanh dao
tu sach » thu sach, su sach, te sach
nghe ar » nghe dan, nghe san, nghe lam
ar hoc » ad hoc, am hoc
su pho » sau pho, su phong
mo hoc » mon hoc, co hoc
su ho » su hoa, su hoc, su co

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach dao nghe ar hoc ) or ( thu hoach day nghiep ((((su ho) or (su pho))) or (mo hoc)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach dao nghe ar hoc ) OR ( thu hoach day nghiep ((((su ho) OR (su pho))) OR (mo hoc)) )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach dao nghe ar hoc ) or ( thu hoach day nghiep ((((su ho) or (su pho))) or (mo hoc)) ))*.