Perhaps you should try some spelling variations:
soc nganh » hoc nganh, hoc nhanh, cac nganh
nganh hoa » thanh hoa, khanh hoa, danh hoa
sach hoc » cach hoc, mach hoc, sach duoc
sach hoi » sach doi, sach moi, cach thoi
cuu long » cuu cong, cuu tong, cuu nang
long soc » lon soc, luong suc, cong so
dap phan » dam phan, dap phap, cap phan
phan dau » phan tu, hang dau
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: vu ((sach hoc) or (sach hoi)) tap, nghien cuu long soc nganh hoa hoc xa hoi dap phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach hoc) OR (sach hoi)) tap, nghien cuu long soc nganh hoa hoc xa hoi dap phan dau.
• Adding a wildcard symbol may retrieve word variants: vu ((sach hoc) or (sach hoi)) tap, nghien cuu long soc nganh hoa hoc xa hoi dap phan dau*.