Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoach hoi » hoc hoi, hoach ha, sach hoi
hoc nganh » hoc nhanh
toan tain » toan tin, toan ban, toan tien
tu hoach » thu hoach, tu hach, quy hoach
khoa hoc » hoa hoc
toan tai » toan tap, doanh tai, toan ban
hoi tap » hoi dap, hoc tap, hoi tai
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 hoach hoi tap, nghien cuu mo hoc nganh khoa hoc xa hoi va ((toan tain) or (toan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu hoach hoi tap, nghien cuu mo hoc nganh khoa hoc xa hoi va ((toan tain) OR (toan tai)).
• Adding a wildcard symbol may retrieve word variants: tu hoach hoi tap, nghien cuu mo hoc nganh khoa hoc xa hoi va ((toan tain) or (toan tai))*.