Perhaps you should try some spelling variations:
soc nganh » hoc nganh, hoc nhanh, cac nganh
sach hoc » cach hoc, sach hoi, mach hoc
cuu long » cuu cong, cuu tong, cuu nang
long soc » lon soc, luong suc, cong so
nhan dan » phan dau, gian dan, nhan tai
tu sach » thu sach, su sach, te sach
va nhan » van nhan, ca nhan, va phan

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 hoc tap, nghien cuu long soc nganh ((khoa hoc) or (hoa hoc)) xa hoi va nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu long soc nganh ((khoa hoc) OR (hoa hoc)) xa hoi va nhan dan.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu long soc nganh ((khoa hoc) or (hoa hoc)) xa hoi va nhan dan*.