Perhaps you should try some spelling variations:
luc doanh » muc doanh, luat doanh, luc canh
doanh hoa » doanh khoa, doanh hoan, danh hoa
cuu dong » cuu cong, cuu tong, cuu long
dong luc » nang luc
nhan van » nhan dan, nhan va, phan van
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
hoc xa » hoc ma
hoi ca » hoi cua, hoi cac, hoi cau

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) or (su sach)) hoc tap, nghien cuu dong luc doanh hoa hoc xa hoi ca nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) hoc tap, nghien cuu dong luc doanh hoa hoc xa hoi ca nhan van.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) hoc tap, nghien cuu dong luc doanh hoa hoc xa hoi ca nhan van*.