Perhaps you should try some spelling variations:
thuoc nganh » thuong nganh, hoc nganh, chuc nganh
long thuoc » luong thuoc, dong thuoc, khong thuoc
nganh khoa » nganh hoa, nganh khong, doanh khoa
thu sach » thuat sach, thuoc sach, thu hoach
cuu long » cuu cong, cuu tong, cuu nang
khoa hoc » hoa hoc
van gian » van giang, dan gian, van giao
gian dan » gian lang
tu sach » su sach, te sach, tu cach
hoi van » hoi va, hoi dan, hai van
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: ((tu sach) or (thu sach)) hoc tap, nghien cuu long thuoc nganh khoa hoc xa hoi van gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) hoc tap, nghien cuu long thuoc nganh khoa hoc xa hoi van gian dan.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) hoc tap, nghien cuu long thuoc nganh khoa hoc xa hoi van gian dan*.