Perhaps you should try some spelling variations:
doanh khoa » toan khoa
muc doanh » cac doanh, cua doanh, mot doanh
cuu nang » chuc nang, cam nang, cuu van
nang muc » nang luc, nang thuc, nang phuc
khoa hoc » hoa hoc
van nhan » van phan, van thanh, danh nhan
nhan tai » hang tai, van tai, toan tai
vu sach » vu bach, su sach, vu khach
hoi van » hoi va, hoi dan, hai van
su cac » tu cac, su cao, su can
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: ((su cac) or (vu sach)) hoc tap, nghien cuu nang muc doanh khoa hoc xa hoi van nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su cac) OR (vu sach)) hoc tap, nghien cuu nang muc doanh khoa hoc xa hoi van nhan tai.
• Adding a wildcard symbol may retrieve word variants: ((su cac) or (vu sach)) hoc tap, nghien cuu nang muc doanh khoa hoc xa hoi van nhan tai*.