Perhaps you should try some spelling variations:
hoi nghiem » hoi nhiem, khoi nghiep, thi nghiem
hoach hoi » hoc hoi, hoach ha, sach hoi
nghiem so » nghiem son, nghiep so, nghiem do
dao nghe » day nghe, dat nghe, nao nghe
du hanh » dieu hanh, duy khanh, luu hanh
da nghe » day nghe, va nghe, dang nghe
so hoc » co hoc, mo hoc, so hoa
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: (( ((du hanh) or (thuc hanh)) ((dao nghe) or (da nghe)) d hoc ) or ( thu hoach hoi nghiem so hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((du hanh) OR (thuc hanh)) ((dao nghe) OR (da nghe)) d hoc ) OR ( thu hoach hoi nghiem so hoc )).
• Adding a wildcard symbol may retrieve word variants: (( ((du hanh) or (thuc hanh)) ((dao nghe) or (da nghe)) d hoc ) or ( thu hoach hoi nghiem so hoc ))*.