Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
van thanh » ban thanh, van tuan
sach hoc » cach hoc, sach hoi, mach hoc
khoa hoc » hoa hoc
van phan » van phong, luan phan, van ban
tu sach » thu sach, su sach, te sach
mo hoc » mon hoc, co hoc
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 hoc tap, nghien cuu mo hoc nganh khoa hoc xa hoi ((van phan) or (van thanh)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu mo hoc nganh khoa hoc xa hoi ((van phan) OR (van thanh)) van.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu mo hoc nganh khoa hoc xa hoi ((van phan) or (van thanh)) van*.