Perhaps you should try some spelling variations:
luat nganh » luat ngan, thuat nganh, luat doanh
thu sach » tu sach, thuat sach, thuoc sach
sach doi » sach hoi, sach moi, sach dao
cuu dong » cuu cong, cuu tong, cuu long
luc ngan » luc nganh, luc nhan, luat ngan
cau nhan » chau nhan, ca nhan, cu nhan
nhan dan » phan dau, gian dan, nhan tai
doi tac » dong tac
hoi cau » hoi chu, hoc cau, hoa cau
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: thu sach doi tac, nghien cuu dong ((luc ngan) or (luat nganh)) hoa hoc xa hoi cau nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach doi tac, nghien cuu dong ((luc ngan) OR (luat nganh)) hoa hoc xa hoi cau nhan dan.
• Adding a wildcard symbol may retrieve word variants: thu sach doi tac, nghien cuu dong ((luc ngan) or (luat nganh)) hoa hoc xa hoi cau nhan dan*.