Perhaps you should try some spelling variations:
hoi nghiem » hoi nhiem, khoi nghiep, thi nghiem
hoach hoi » hoc hoi, hoach ha, sach hoi
day nghe » dang nghe, van nghe, cap nghe
nam nghe » nang nghe, van nghe
tu lanh » tu hanh, tu lenh, tu manh
新 hoc » y hoc, _ hoc, o hoc
su hoc » du hoc, so hoc, su ho
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) OR (nam nghe)) 新 hoc ) or ( thu hoach hoi nghiem ((su hoc) or (tu hoc)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu lanh ((day nghe) OR (nam nghe)) 新 hoc ) OR ( thu hoach hoi nghiem ((su hoc) OR (tu hoc)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu lanh ((day nghe) OR (nam nghe)) 新 hoc ) or ( thu hoach hoi nghiem ((su hoc) or (tu hoc)) ))".
• Adding a wildcard symbol may retrieve word variants: (( tu lanh ((day nghe) OR (nam nghe)) 新 hoc ) or ( thu hoach hoi nghiem ((su hoc) or (tu hoc)) ))*.