Perhaps you should try some spelling variations:
nganh thuong » anh thuong, doanh thuong, nang thuong
thuong ho » tuong ho, truong hoc, thuong chi
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
cuu long » cuu cong, cuu tong, cuu nang
co nganh » hoc nganh, cac nganh, moi nganh
nhan dan » gian dan, nhan tai
phan dau » phan tu, hang dau
long co » dong co, cong co, lang co
hai van » thai van, ha van, hai tan
xa hai » xa thai, xua hai, xa hoi
ho xa » hoa xa, hoc xa, cho xa

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 hoc tap, nghien cuu long co nganh thuong ho xa hai van ((nhan dan) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach hoc tap, nghien cuu long co nganh thuong ho xa hai van ((nhan dan) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghien cuu long co nganh thuong ho xa hai van ((nhan dan) or (phan dau))*.