Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nganh hoa » thanh hoa, khanh hoa, danh hoa
sach dao » lanh dao
cuu dong » cuu cong, cuu tong, cuu long
dong luc » nang luc
van phan » van phong, van thanh, luan phan
tu sach » thu sach, su sach, te sach
dao tac » dao tao, dao tuc, dao tay
hoi van » hoi va, hoi dan, hai van
phan va » phan van, nhan va, han va
hoc xa » hoc ma

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 tac, nghien cuu dong luc ((nganh hoa) or (nganh khong)) hoc xa hoi van phan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach dao tac, nghien cuu dong luc ((nganh hoa) OR (nganh khong)) hoc xa hoi van phan va.
• Adding a wildcard symbol may retrieve word variants: tu sach dao tac, nghien cuu dong luc ((nganh hoa) or (nganh khong)) hoc xa hoi van phan va*.