Perhaps you should try some spelling variations:
hoi nghiem » hoi nhiem, khoi nghiep, thi nghiem
hoach hoi » hoc hoi, hoach ha, sach hoi
lanh day » lanh dao, lanh lay, danh dau
day nghe » dang nghe, van nghe, nam nghe
tu lanh » tu hanh, tu lenh, tu manh
su hoc » du hoc, su ho, su hoa
so hoc » co hoc, mo hoc, so hoa
tu hoc » te hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu lanh day nghe _ hoc ) or ( thu hoach hoi nghiem ((((su hoc) or (so hoc))) or (tu hoc)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu lanh day nghe _ hoc ) OR ( thu hoach hoi nghiem ((((su hoc) OR (so hoc))) OR (tu hoc)) )).
• Adding a wildcard symbol may retrieve word variants: (( tu lanh day nghe _ hoc ) or ( thu hoach hoi nghiem ((((su hoc) or (so hoc))) or (tu hoc)) ))*.