Perhaps you should try some spelling variations:
thi nghiem » thuc nghiem
hoach thi » hoach thu, hoach toi, hoach thay
dao nghe » day nghe, da nghe, dat nghe
tu lanh » tu hanh, tu lenh, tu manh
nghe d » nghe di, nghe _, nghe 新
su hoc » tu hoc, du hoc, su ho
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu lanh dao nghe d hoc ) OR ( thu hoach thi nghiem ((su hoc) OR (so hoc)) ))~.
• Adding a wildcard symbol may retrieve word variants: (( tu lanh dao nghe d hoc ) or ( thu hoach thi nghiem ((su hoc) or (so hoc)) ))*.