Perhaps you should try some spelling variations:
chuc nganh » chuc nang, hoc nganh, cac nganh
nganh nong » nganh cong
dong chuc » cong chuc, don chuc, dong cuc
thu sach » thuat sach, thuoc sach, thu hoach
cuu dong » cuu cong, cuu tong, cuu long
nhan dan » phan dau, gian dan, nhan tai
tu sach » su sach, te sach, tu cach
hoi tai » hoc tai, hoi trac
thon ma » than ma, thong may, thong va
va nhan » van nhan, ca nhan, va phan
ma hoi » mai hoi, xa hoi, ma hoa

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 sach) OR (thu sach)) hoi tai, nghien cuu dong chuc nganh nong thon ma hoi va nhan dan~.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) hoi tai, nghien cuu dong chuc nganh nong thon ma hoi va nhan dan*.